USING IRONPDF

C# Create PDF (Code Example Tutorial)

Jacob Mellor

Updated:July 13, 2025

Creating PDFs in C# is an essential skill for modern .NET developers, whether you're building financial reports, generating healthcare documents, or producing e-commerce receipts. With the right .NET PDF library, you can transform HTML content into professional PDF documents with just a few lines of code, giving you complete control over document structure and appearance.

IronPDF is the simplest, most usable .NET PDF creation library by a long way - with an incredibly easy learning curve that gets you generating PDFs in minutes, not hours. This comprehensive guide will show you exactly how to create PDF documents in C# using IronPDF - a powerful C# PDF generator that produces pixel-perfect results and supports every modern .NET platform, including the upcoming .NET 10 release in November 2025. While this tutorial covers everything from the simplest use cases to the most advanced PDF generation scenarios, don't get intimidated - start from the beginning and work forwards. You'll learn multiple ways to generate PDFs, from simple HTML strings to complex multi-page reports, plus how to troubleshoot common issues and optimize performance for various PDF generation tasks.

When you need help, IronPDF's support team consists of actual engineers who understand your challenges. With 24/7 live chat support and typical response times under 30 seconds, you're never stuck waiting for answers. This level of support is why developers consistently rate IronPDF as having the best support in the industry. The support team can help with everything fr# How to Create PDFs in C# - The Complete Guide to PDF Generation in .NET

Quick Start: Create Your First PDF in C# (Under 2 Minutes)

Want to generate a PDF right now? Let's create a simple but functional PDF document that demonstrates the power of modern PDF generation in .NET. First, install IronPDF via NuGet Package Manager - this single package contains everything you need to start creating PDFs immediately. IronPDF is free for development, so you can experiment with all features before deciding on a license.

Install-Package IronPdf

Now let's create PDF content using C#:

using IronPdf;

// Instantiate the PDF generator - this is your gateway to PDF creation
var renderer = new ChromePdfRenderer();

// Create a PDF from HTML string - yes, it's really this simple!
var pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1><p>PDF generated successfully!</p>");

// Save your newly created PDF document
pdf.SaveAs("my-first-pdf.pdf");

Console.WriteLine("PDF generated successfully!");

using IronPdf;

// Instantiate the PDF generator - this is your gateway to PDF creation
var renderer = new ChromePdfRenderer();

// Create a PDF from HTML string - yes, it's really this simple!
var pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1><p>PDF generated successfully!</p>");

// Save your newly created PDF document
pdf.SaveAs("my-first-pdf.pdf");

Console.WriteLine("PDF generated successfully!");

Imports IronPdf

' Instantiate the PDF generator - this is your gateway to PDF creation
Private renderer = New ChromePdfRenderer()

' Create a PDF from HTML string - yes, it's really this simple!
Private pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1><p>PDF generated successfully!</p>")

' Save your newly created PDF document
pdf.SaveAs("my-first-pdf.pdf")

Console.WriteLine("PDF generated successfully!")

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That's it! You just created your first PDF document in C#. No need to learn complex PDF APIs, no server dependencies to install, no low-level PDF commands to master. Just HTML in, PDF out - the way PDF generation should be. But this is just the beginning - let's explore why this approach is so powerful and how you can create more sophisticated PDF documents.

How to Create a PDF in C#: A Quick Overview

To create a PDF in C#, you can utilize third-party libraries like IronPDF, QuestPDF, or PDFsharp. These libraries offer various functionalities, including creating PDFs from scratch, converting HTML to PDF, and more.

Here's a general outline of the process:

Install a PDF library: Use NuGet Package Manager in Visual Studio to install a suitable library.
Create a new PDF document: Instantiate a PDF document object.
Add content: Add pages, text, images, and other elements to the document.
Save the document: Specify a file path and save the PDF.

Here's an example using IronPDF:

using IronPdf;

public class Example
{
    public static void CreatePdf()
    {
        // Create a new PDF document
        var pdf = new ChromePdfRenderer();

        // Add some text
        string htmlContent = "<h1>Hello, PDF!</h1><p>This is a dynamically created PDF.</p>";

        // Render HTML to PDF
        var pdfDocument = pdf.RenderHtmlAsPdf(htmlContent);

        // Save the PDF
        pdfDocument.SaveAs("MyDynamicPdf.pdf");
    }
}

using IronPdf;

public class Example
{
    public static void CreatePdf()
    {
        // Create a new PDF document
        var pdf = new ChromePdfRenderer();

        // Add some text
        string htmlContent = "<h1>Hello, PDF!</h1><p>This is a dynamically created PDF.</p>";

        // Render HTML to PDF
        var pdfDocument = pdf.RenderHtmlAsPdf(htmlContent);

        // Save the PDF
        pdfDocument.SaveAs("MyDynamicPdf.pdf");
    }
}

Imports IronPdf

Public Class Example
	Public Shared Sub CreatePdf()
		' Create a new PDF document
		Dim pdf = New ChromePdfRenderer()

		' Add some text
		Dim htmlContent As String = "<h1>Hello, PDF!</h1><p>This is a dynamically created PDF.</p>"

		' Render HTML to PDF
		Dim pdfDocument = pdf.RenderHtmlAsPdf(htmlContent)

		' Save the PDF
		pdfDocument.SaveAs("MyDynamicPdf.pdf")
	End Sub
End Class

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Now, let's dive deeper into why developers need to create PDFs and explore the many ways IronPDF makes this process simple and powerful.

Why Would Developers Need to Create PDFs in C#?

Creating PDFs programmatically in C# opens up a world of possibilities for automating document generation and streamlining business processes. IronPDF has been trusted by over 14 million installed developers globally to achieve these tasks because it provides unmatched reliability and ease of use for building PDFs in .NET. In finance, developers use C# to create PDF invoices, statements, and regulatory reports that require precise formatting and security features. Healthcare organizations generate patient records, lab results, and insurance forms as PDFs to ensure document integrity and HIPAA compliance. E-commerce platforms produce PDF receipts, shipping labels, and tickets with QR codes (using tools like IronQR) embedded directly in the PDF. The ability to manipulate PDF documents programmatically means you can create, modify, and secure documents at scale without manual intervention.

The beauty of using a modern .NET PDF library like IronPDF is that it seamlessly integrates into your organization's existing workflows. Whether you're converting Word documents from your business users, transforming Markdown documentation from your development team, or generating PDFs from web-based reports, IronPDF handles it all. This organizational flexibility is why companies choose programmatic PDF generation in .NET - it eliminates manual document creation, reduces errors, ensures consistency across all generated PDFs, and saves countless hours of employee time. Instead of learning proprietary PDF syntax or positioning every element manually, you can use HTML and CSS to design your documents. This approach dramatically reduces development time and makes it easy to maintain consistent branding across all your produced PDFs. Whether you're creating a single-page invoice or a complex multi-chapter report, the principles remain the same - design with HTML, generate PDFs with C#.

Setting Up IronPDF in Your C# Project

Before diving into creating PDFs, let's ensure your development environment is properly configured for optimal PDF generation. IronPDF supports all modern .NET versions, including .NET 8, .NET 9, and is already compliant with the upcoming .NET 10 release scheduled for November 2025 (Iron Software works closely with the .NET Foundation and Microsoft to ensure day-one compatibility). The setup process is straightforward, but understanding your options helps you choose the best approach for your specific needs.

Installation Methods

Method 1: Visual Studio Package Manager (Recommended for Beginners)

The easiest way to get started with IronPDF is through Visual Studio's built-in NuGet Package Manager. This graphical interface makes it simple to browse, install, and manage your PDF generation dependencies:

Right-click your project in Solution Explorer
Select "Manage NuGet Packages"
Click "Browse" and search for "IronPDF"
Select the IronPdf package by Iron Software
Click Install and accept the license agreement

Method 2: Package Manager Console

For developers who prefer command-line tools, the Package Manager Console provides a quick way to install IronPDF:

Install-Package IronPdf

Method 3: .NET CLI (For Cross-Platform Development)

If you're working on macOS, Linux, or prefer the .NET CLI, use this command in your project directory:

dotnet add package IronPdf

Choosing the Right Package

IronPDF offers different NuGet packages optimized for various deployment scenarios. Understanding these options helps you minimize deployment size and optimize performance:

IronPdf: The standard package that includes everything you need for Windows, macOS, and Linux. Perfect for most applications.
IronPdf.Slim: A lightweight base package that downloads platform-specific components at runtime. Ideal for cloud deployments where package size matters.
IronPdf.Linux: Optimized specifically for Linux deployments with all required dependencies pre-packaged.
IronPdf.MacOs: Tailored for macOS environments with native Apple Silicon support.

Please note

For cloud deployments on Azure, AWS, or Docker, consider using IronPdf.Slim to reduce your container size. The required components will be downloaded automatically on first use.

Verifying Your Installation

After installation, verify everything is working correctly with this simple test that creates a new document:

using IronPdf;
using System.IO;

// Test your IronPDF installation
var renderer = new ChromePdfRenderer();
var testPdf = renderer.RenderHtmlAsPdf("<p>Installation test successful!</p>");
testPdf.SaveAs("test.pdf");

if (File.Exists("test.pdf"))
{
    Console.WriteLine("IronPDF installed and working correctly!");
}

using IronPdf;
using System.IO;

// Test your IronPDF installation
var renderer = new ChromePdfRenderer();
var testPdf = renderer.RenderHtmlAsPdf("<p>Installation test successful!</p>");
testPdf.SaveAs("test.pdf");

if (File.Exists("test.pdf"))
{
    Console.WriteLine("IronPDF installed and working correctly!");
}

Imports IronPdf
Imports System.IO

' Test your IronPDF installation
Private renderer = New ChromePdfRenderer()
Private testPdf = renderer.RenderHtmlAsPdf("<p>Installation test successful!</p>")
testPdf.SaveAs("test.pdf")

If File.Exists("test.pdf") Then
	Console.WriteLine("IronPDF installed and working correctly!")
End If

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What Are the Different Ways to Generate PDFs in C#?

IronPDF provides multiple approaches to build PDF documents, each suited to different scenarios and requirements. Understanding these methods helps you choose the most efficient approach for your specific use case when you need to produce PDFs in .NET. Whether you're creating PDFs from scratch with HTML strings, converting existing files, or capturing live web content, IronPDF has you covered as a comprehensive C# PDF generator. Let's explore each method in detail with practical examples that demonstrate real-world applications for PDF creation in C#.

1. Create PDF from HTML String (Most Flexible)

Creating PDFs from HTML strings gives you complete control over the content and styling of your final document when you need to convert HTML content to PDF format. This method is perfect for generating dynamic reports, invoices, or any document where the content changes based on data. You can convert HTML content into professional PDFs using modern HTML5 and CSS3 features, including flexbox and grid layouts. The ability to dynamically convert HTML content makes this the most versatile approach for PDF creation in C#:

using IronPdf;
using System;
using System.Linq;

var renderer = new ChromePdfRenderer();

// Build dynamic content with data
var customerName = "Acme Corporation";
var orderDate = DateTime.Now;
var items = new[] { 
    new { Name = "Widget Pro", Price = 99.99m },
    new { Name = "Gadget Plus", Price = 149.99m }
};

// Create HTML with embedded data and modern CSS
var html = $@"
    <html>
    <head>
        <style>
            body {{ 
                font-family: 'Segoe UI', Arial, sans-serif; 
                margin: 40px;
                color: #333;
            }}
            .invoice-header {{
                display: flex;
                justify-content: space-between;
                border-bottom: 2px solid #0066cc;
                padding-bottom: 20px;
            }}
            .items-table {{
                width: 100%;
                margin-top: 30px;
                border-collapse: collapse;
            }}
            .items-table th {{
                background: #f0f0f0;
                padding: 10px;
                text-align: left;
            }}
        </style>
    </head>
    <body>
        <div class='invoice-header'>
            <div>
                <h1>Invoice</h1>
                <p>Customer: {customerName}</p>
            </div>
            <div>
                <p>Date: {orderDate:yyyy-MM-dd}</p>
                <p>Invoice #: INV-{orderDate:yyyyMMdd}-001</p>
            </div>
        </div>

        <table class='items-table'>
            <thead>
                <tr>
                    <th>Item</th>
                    <th>Price</th>
                </tr>
            </thead>
            <tbody>";

foreach (var item in items)
{
    html += $@"
                <tr>
                    <td>{item.Name}</td>
                    <td>${item.Price:F2}</td>
                </tr>";
}

html += @"
            </tbody>
        </table>
    </body>
    </html>";

// Generate the PDF document
var pdf = renderer.RenderHtmlAsPdf(html);
pdf.SaveAs($"invoice-{orderDate:yyyyMMdd}.pdf");

using IronPdf;
using System;
using System.Linq;

var renderer = new ChromePdfRenderer();

// Build dynamic content with data
var customerName = "Acme Corporation";
var orderDate = DateTime.Now;
var items = new[] { 
    new { Name = "Widget Pro", Price = 99.99m },
    new { Name = "Gadget Plus", Price = 149.99m }
};

// Create HTML with embedded data and modern CSS
var html = $@"
    <html>
    <head>
        <style>
            body {{ 
                font-family: 'Segoe UI', Arial, sans-serif; 
                margin: 40px;
                color: #333;
            }}
            .invoice-header {{
                display: flex;
                justify-content: space-between;
                border-bottom: 2px solid #0066cc;
                padding-bottom: 20px;
            }}
            .items-table {{
                width: 100%;
                margin-top: 30px;
                border-collapse: collapse;
            }}
            .items-table th {{
                background: #f0f0f0;
                padding: 10px;
                text-align: left;
            }}
        </style>
    </head>
    <body>
        <div class='invoice-header'>
            <div>
                <h1>Invoice</h1>
                <p>Customer: {customerName}</p>
            </div>
            <div>
                <p>Date: {orderDate:yyyy-MM-dd}</p>
                <p>Invoice #: INV-{orderDate:yyyyMMdd}-001</p>
            </div>
        </div>

        <table class='items-table'>
            <thead>
                <tr>
                    <th>Item</th>
                    <th>Price</th>
                </tr>
            </thead>
            <tbody>";

foreach (var item in items)
{
    html += $@"
                <tr>
                    <td>{item.Name}</td>
                    <td>${item.Price:F2}</td>
                </tr>";
}

html += @"
            </tbody>
        </table>
    </body>
    </html>";

// Generate the PDF document
var pdf = renderer.RenderHtmlAsPdf(html);
pdf.SaveAs($"invoice-{orderDate:yyyyMMdd}.pdf");

Imports IronPdf
Imports System
Imports System.Linq

Private renderer = New ChromePdfRenderer()

' Build dynamic content with data
Private customerName = "Acme Corporation"
Private orderDate = DateTime.Now
Private items = {
	New With {
		Key .Name = "Widget Pro",
		Key .Price = 99.99D
	},
	New With {
		Key .Name = "Gadget Plus",
		Key .Price = 149.99D
	}
}

' Create HTML with embedded data and modern CSS
Private html = $"
    <html>
    <head>
        <style>
            body {{ 
                font-family: 'Segoe UI', Arial, sans-serif; 
                margin: 40px;
                color: #333;
            }}
            .invoice-header {{
                display: flex;
                justify-content: space-between;
                border-bottom: 2px solid #0066cc;
                padding-bottom: 20px;
            }}
            .items-table {{
                width: 100%;
                margin-top: 30px;
                border-collapse: collapse;
            }}
            .items-table th {{
                background: #f0f0f0;
                padding: 10px;
                text-align: left;
            }}
        </style>
    </head>
    <body>
        <div class='invoice-header'>
            <div>
                <h1>Invoice</h1>
                <p>Customer: {customerName}</p>
            </div>
            <div>
                <p>Date: {orderDate:yyyy-MM-dd}</p>
                <p>Invoice #: INV-{orderDate:yyyyMMdd}-001</p>
            </div>
        </div>

        <table class='items-table'>
            <thead>
                <tr>
                    <th>Item</th>
                    <th>Price</th>
                </tr>
            </thead>
            <tbody>"

For Each item In items
	html += $"
                <tr>
                    <td>{item.Name}</td>
                    <td>${item.Price:F2}</td>
                </tr>"
Next item

html &= "
            </tbody>
        </table>
    </body>
    </html>"

' Generate the PDF document
Dim pdf = renderer.RenderHtmlAsPdf(html)
pdf.SaveAs($"invoice-{orderDate:yyyyMMdd}.pdf")

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2. Generate PDF from URL (Web Page Capture)

Sometimes you need to convert existing web pages into PDF documents - perfect for archiving, reporting, or creating offline versions of online content. IronPDF's URL to PDF conversion uses a real Chromium engine, ensuring that complex JavaScript-heavy sites render correctly. This method is invaluable for creating snapshots of dashboards, saving online receipts, or documenting web-based reports:

using IronPdf;

var renderer = new ChromePdfRenderer();

// Configure rendering options for optimal capture
renderer.RenderingOptions.PaperSize = PdfPaperSize.A4;
renderer.RenderingOptions.MarginTop = 25;
renderer.RenderingOptions.MarginBottom = 25;

// Wait for JavaScript to fully load (important for SPAs)
renderer.RenderingOptions.RenderDelay = 2000; // 2 seconds

// Enable JavaScript execution
renderer.RenderingOptions.EnableJavaScript = true;

// Capture a web page as PDF
var pdf = renderer.RenderUrlAsPdf("https://example.com/dashboard");
pdf.SaveAs("dashboard-capture.pdf");

// For authenticated pages, you can set cookies
var cookieManager = renderer.RenderingOptions.CustomCookies;
cookieManager["session_id"] = "your-session-token";

// Capture authenticated content
var securePdf = renderer.RenderUrlAsPdf("https://app.example.com/private/report");
securePdf.SaveAs("private-report.pdf");

using IronPdf;

var renderer = new ChromePdfRenderer();

// Configure rendering options for optimal capture
renderer.RenderingOptions.PaperSize = PdfPaperSize.A4;
renderer.RenderingOptions.MarginTop = 25;
renderer.RenderingOptions.MarginBottom = 25;

// Wait for JavaScript to fully load (important for SPAs)
renderer.RenderingOptions.RenderDelay = 2000; // 2 seconds

// Enable JavaScript execution
renderer.RenderingOptions.EnableJavaScript = true;

// Capture a web page as PDF
var pdf = renderer.RenderUrlAsPdf("https://example.com/dashboard");
pdf.SaveAs("dashboard-capture.pdf");

// For authenticated pages, you can set cookies
var cookieManager = renderer.RenderingOptions.CustomCookies;
cookieManager["session_id"] = "your-session-token";

// Capture authenticated content
var securePdf = renderer.RenderUrlAsPdf("https://app.example.com/private/report");
securePdf.SaveAs("private-report.pdf");

Imports IronPdf

Private renderer = New ChromePdfRenderer()

' Configure rendering options for optimal capture
renderer.RenderingOptions.PaperSize = PdfPaperSize.A4
renderer.RenderingOptions.MarginTop = 25
renderer.RenderingOptions.MarginBottom = 25

' Wait for JavaScript to fully load (important for SPAs)
renderer.RenderingOptions.RenderDelay = 2000 ' 2 seconds

' Enable JavaScript execution
renderer.RenderingOptions.EnableJavaScript = True

' Capture a web page as PDF
Dim pdf = renderer.RenderUrlAsPdf("https://example.com/dashboard")
pdf.SaveAs("dashboard-capture.pdf")

' For authenticated pages, you can set cookies
Dim cookieManager = renderer.RenderingOptions.CustomCookies
cookieManager("session_id") = "your-session-token"

' Capture authenticated content
Dim securePdf = renderer.RenderUrlAsPdf("https://app.example.com/private/report")
securePdf.SaveAs("private-report.pdf")

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3. Create PDF from HTML File (Template-Based Generation)

Template-based PDF generation is ideal when you have complex layouts that designers can maintain separately from your application code. By storing HTML templates as files, you enable a clean separation between design and logic. This approach works exceptionally well for generating consistent documents like certificates, contracts, or standardized reports:

using IronPdf;
using System.IO;
using System;

var renderer = new ChromePdfRenderer();

// Basic file conversion
var pdf = renderer.RenderHtmlFileAsPdf("Templates/certificate-template.html");
pdf.SaveAs("certificate.pdf");

// Advanced: Using templates with asset directories
// Perfect when your HTML references images, CSS, or JavaScript files
var basePath = Path.Combine(Directory.GetCurrentDirectory(), "Templates", "Assets");
var pdfWithAssets = renderer.RenderHtmlFileAsPdf(
    "Templates/report-template.html", 
    basePath  // IronPDF will resolve relative paths from here
);

// Even better: Template with placeholders
var templateHtml = File.ReadAllText("Templates/contract-template.html");
templateHtml = templateHtml
    .Replace("{{ClientName}}", "Tech Innovations Inc.")
    .Replace("{{ContractDate}}", DateTime.Now.ToString("MMMM dd, yyyy"))
    .Replace("{{ContractValue}}", "$50,000");

var contractPdf = renderer.RenderHtmlAsPdf(templateHtml);
contractPdf.SaveAs("contract-final.pdf");

using IronPdf;
using System.IO;
using System;

var renderer = new ChromePdfRenderer();

// Basic file conversion
var pdf = renderer.RenderHtmlFileAsPdf("Templates/certificate-template.html");
pdf.SaveAs("certificate.pdf");

// Advanced: Using templates with asset directories
// Perfect when your HTML references images, CSS, or JavaScript files
var basePath = Path.Combine(Directory.GetCurrentDirectory(), "Templates", "Assets");
var pdfWithAssets = renderer.RenderHtmlFileAsPdf(
    "Templates/report-template.html", 
    basePath  // IronPDF will resolve relative paths from here
);

// Even better: Template with placeholders
var templateHtml = File.ReadAllText("Templates/contract-template.html");
templateHtml = templateHtml
    .Replace("{{ClientName}}", "Tech Innovations Inc.")
    .Replace("{{ContractDate}}", DateTime.Now.ToString("MMMM dd, yyyy"))
    .Replace("{{ContractValue}}", "$50,000");

var contractPdf = renderer.RenderHtmlAsPdf(templateHtml);
contractPdf.SaveAs("contract-final.pdf");

Imports IronPdf
Imports System.IO
Imports System

Private renderer = New ChromePdfRenderer()

' Basic file conversion
Private pdf = renderer.RenderHtmlFileAsPdf("Templates/certificate-template.html")
pdf.SaveAs("certificate.pdf")

' Advanced: Using templates with asset directories
' Perfect when your HTML references images, CSS, or JavaScript files
Dim basePath = Path.Combine(Directory.GetCurrentDirectory(), "Templates", "Assets")
Dim pdfWithAssets = renderer.RenderHtmlFileAsPdf("Templates/report-template.html", basePath)

' Even better: Template with placeholders
Dim templateHtml = File.ReadAllText("Templates/contract-template.html")
templateHtml = templateHtml.Replace("{{ClientName}}", "Tech Innovations Inc.").Replace("{{ContractDate}}", DateTime.Now.ToString("MMMM dd, yyyy")).Replace("{{ContractValue}}", "$50,000")

Dim contractPdf = renderer.RenderHtmlAsPdf(templateHtml)
contractPdf.SaveAs("contract-final.pdf")

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4. Convert Markdown to PDF

Markdown has become the standard for technical documentation, README files, and content management systems. IronPDF makes it easy to convert Markdown content directly to PDF, preserving formatting while creating professional-looking documents. This feature is particularly valuable for organizations that maintain their documentation in Markdown format - developers can write documentation in their preferred format, and the system can automatically generate PDFs for distribution to clients or stakeholders.

using IronPdf;

var renderer = new ChromePdfRenderer();

// Convert Markdown string to PDF
string markdownContent = @"
# Project Documentation

## Overview
This project demonstrates **PDF generation** from _Markdown_ content.

### Features
- Easy conversion
- Preserves formatting
- Supports lists and tables

| Feature | Status |
|---------|--------|
| Markdown Support | ✓ |
| Table Rendering | ✓ |
| Code Blocks | ✓ |

```csharp
// Code blocks are preserved
var pdf = RenderMarkdownAsPdf(markdown);
\`\`\`
";

// Render Markdown as PDF
var pdfFromMarkdown = renderer.RenderMarkdownStringAsPdf(markdownContent);
pdfFromMarkdown.SaveAs("documentation.pdf");

// Convert Markdown file to PDF
var pdfFromFile = renderer.RenderMarkdownFileAsPdf("README.md");
pdfFromFile.SaveAs("readme-pdf.pdf");

using IronPdf;

var renderer = new ChromePdfRenderer();

// Convert Markdown string to PDF
string markdownContent = @"
# Project Documentation

## Overview
This project demonstrates **PDF generation** from _Markdown_ content.

### Features
- Easy conversion
- Preserves formatting
- Supports lists and tables

| Feature | Status |
|---------|--------|
| Markdown Support | ✓ |
| Table Rendering | ✓ |
| Code Blocks | ✓ |

```csharp
// Code blocks are preserved
var pdf = RenderMarkdownAsPdf(markdown);
\`\`\`
";

// Render Markdown as PDF
var pdfFromMarkdown = renderer.RenderMarkdownStringAsPdf(markdownContent);
pdfFromMarkdown.SaveAs("documentation.pdf");

// Convert Markdown file to PDF
var pdfFromFile = renderer.RenderMarkdownFileAsPdf("README.md");
pdfFromFile.SaveAs("readme-pdf.pdf");

Imports IronPdf

Private renderer = New ChromePdfRenderer()

' Convert Markdown string to PDF
Private markdownContent As String = "
# Project Documentation

## Overview
This project demonstrates **PDF generation** from _Markdown_ content.

### Features
- Easy conversion
- Preserves formatting
- Supports lists and tables

| Feature | Status |
|---------|--------|
| Markdown Support | ✓ |
| Table Rendering | ✓ |
| Code Blocks | ✓ |

```csharp
// Code blocks are preserved
var pdf = RenderMarkdownAsPdf(markdown);
\`\`\`
"

' Render Markdown as PDF
Private pdfFromMarkdown = renderer.RenderMarkdownStringAsPdf(markdownContent)
pdfFromMarkdown.SaveAs("documentation.pdf")

' Convert Markdown file to PDF
Dim pdfFromFile = renderer.RenderMarkdownFileAsPdf("README.md")
pdfFromFile.SaveAs("readme-pdf.pdf")

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The Markdown to PDF conversion is particularly useful for organizations that use version control systems like Git. Your entire documentation workflow can be automated - developers update Markdown files, CI/CD pipelines automatically generate PDF documents, and stakeholders receive professionally formatted documentation without any manual intervention. This seamless integration into existing workflows is why many development teams choose IronPDF for their documentation needs.

5. Convert Word Documents (DOCX) to PDF

Many businesses have existing Word documents that need to be converted to PDF for distribution or archiving. IronPDF provides seamless DOCX to PDF conversion that preserves formatting, images, and even complex features like mail merge. This capability is transformative for organizations - business users can continue working in familiar Microsoft Word while the system automatically generates PDFs for external distribution. The DOCX to PDF conversion feature bridges the gap between business users who prefer Word and the need for secure, uneditable PDF documents.

using IronPdf;
using System.Collections.Generic;

// Simple DOCX to PDF conversion
var docxRenderer = new DocxToPdfRenderer();
var pdfFromDocx = docxRenderer.RenderDocxAsPdf("proposal.docx");
pdfFromDocx.SaveAs("proposal.pdf");

// Advanced: Mail merge functionality for mass document generation
var recipients = new List<Dictionary<string, string>>
{
    new() { ["Name"] = "John Smith", ["Company"] = "Tech Corp", ["Date"] = "March 15, 2024" },
    new() { ["Name"] = "Jane Doe", ["Company"] = "Innovation Inc", ["Date"] = "March 15, 2024" }
};

// Configure mail merge options
var options = new DocxPdfRenderOptions
{
    MailMergeDataSource = recipients,
    MailMergePrintAllInOnePdfDocument = false // Creates separate PDFs
};

// Generate personalized PDFs from template
foreach (var recipient in recipients)
{
    var personalizedPdf = docxRenderer.RenderDocxAsPdf("letter-template.docx", options);
    personalizedPdf.SaveAs($"letter-{recipient["Name"].Replace(" ", "-")}.pdf");
}

using IronPdf;
using System.Collections.Generic;

// Simple DOCX to PDF conversion
var docxRenderer = new DocxToPdfRenderer();
var pdfFromDocx = docxRenderer.RenderDocxAsPdf("proposal.docx");
pdfFromDocx.SaveAs("proposal.pdf");

// Advanced: Mail merge functionality for mass document generation
var recipients = new List<Dictionary<string, string>>
{
    new() { ["Name"] = "John Smith", ["Company"] = "Tech Corp", ["Date"] = "March 15, 2024" },
    new() { ["Name"] = "Jane Doe", ["Company"] = "Innovation Inc", ["Date"] = "March 15, 2024" }
};

// Configure mail merge options
var options = new DocxPdfRenderOptions
{
    MailMergeDataSource = recipients,
    MailMergePrintAllInOnePdfDocument = false // Creates separate PDFs
};

// Generate personalized PDFs from template
foreach (var recipient in recipients)
{
    var personalizedPdf = docxRenderer.RenderDocxAsPdf("letter-template.docx", options);
    personalizedPdf.SaveAs($"letter-{recipient["Name"].Replace(" ", "-")}.pdf");
}

Imports IronPdf
Imports System.Collections.Generic

' Simple DOCX to PDF conversion
Private docxRenderer = New DocxToPdfRenderer()
Private pdfFromDocx = docxRenderer.RenderDocxAsPdf("proposal.docx")
pdfFromDocx.SaveAs("proposal.pdf")

' Advanced: Mail merge functionality for mass document generation
Dim recipients = New List(Of Dictionary(Of String, String)) From {
	New() {
		("Name") = "John Smith",
		("Company") = "Tech Corp",
		("Date") = "March 15, 2024"
	},
	New() {
		("Name") = "Jane Doe",
		("Company") = "Innovation Inc",
		("Date") = "March 15, 2024"
	}
}

' Configure mail merge options
Dim options = New DocxPdfRenderOptions With {
	.MailMergeDataSource = recipients,
	.MailMergePrintAllInOnePdfDocument = False
}

' Generate personalized PDFs from template
For Each recipient In recipients
	Dim personalizedPdf = docxRenderer.RenderDocxAsPdf("letter-template.docx", options)
	personalizedPdf.SaveAs($"letter-{recipient("Name").Replace(" ", "-")}.pdf")
Next recipient

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This DOCX conversion feature is invaluable for automating document workflows within organizations. Consider a sales team that creates proposals in Word - with IronPDF, these proposals can be automatically converted to PDF with watermarks, security settings, and digital signatures applied programmatically. The mail merge functionality enables mass generation of personalized PDF documents - perfect for creating thousands of customized letters, certificates, or contracts without manual intervention. This integration capability is why IronPDF is trusted by enterprises worldwide to handle their document automation needs.

6. Convert Images to PDF

Converting images to PDF is essential for creating photo albums, scanned document compilations, or image-based reports. IronPDF supports all major image formats and provides options for controlling layout and quality:

using IronPdf;
using IronPdf.Imaging; // Install-Package IronPdf
using System.IO;

var renderer = new ChromePdfRenderer();

// Convert single image to PDF
var imagePath = "product-photo.jpg";
var imageHtml = $@"
    <html>
    <body style='margin: 0; padding: 0;'>
        <img src='{imagePath}' style='width: 100%; height: auto;' />
    </body>
    </html>";

var imagePdf = renderer.RenderHtmlAsPdf(imageHtml, Path.GetDirectoryName(imagePath));
imagePdf.SaveAs("product-catalog-page.pdf");

// Create multi-page PDF from multiple images
var imageFiles = Directory.GetFiles("ProductImages", "*.jpg");
var catalogHtml = "<html><body style='margin: 0;'>";

foreach (var image in imageFiles)
{
    catalogHtml += $@"
        <div style='page-break-after: always;'>
            <img src='{Path.GetFileName(image)}' style='width: 100%; height: auto;' />
            <p style='text-align: center;'>{Path.GetFileNameWithoutExtension(image)}</p>
        </div>";
}

catalogHtml += "</body></html>";

var catalogPdf = renderer.RenderHtmlAsPdf(catalogHtml, "ProductImages");
catalogPdf.SaveAs("product-catalog.pdf");

using IronPdf;
using IronPdf.Imaging; // Install-Package IronPdf
using System.IO;

var renderer = new ChromePdfRenderer();

// Convert single image to PDF
var imagePath = "product-photo.jpg";
var imageHtml = $@"
    <html>
    <body style='margin: 0; padding: 0;'>
        <img src='{imagePath}' style='width: 100%; height: auto;' />
    </body>
    </html>";

var imagePdf = renderer.RenderHtmlAsPdf(imageHtml, Path.GetDirectoryName(imagePath));
imagePdf.SaveAs("product-catalog-page.pdf");

// Create multi-page PDF from multiple images
var imageFiles = Directory.GetFiles("ProductImages", "*.jpg");
var catalogHtml = "<html><body style='margin: 0;'>";

foreach (var image in imageFiles)
{
    catalogHtml += $@"
        <div style='page-break-after: always;'>
            <img src='{Path.GetFileName(image)}' style='width: 100%; height: auto;' />
            <p style='text-align: center;'>{Path.GetFileNameWithoutExtension(image)}</p>
        </div>";
}

catalogHtml += "</body></html>";

var catalogPdf = renderer.RenderHtmlAsPdf(catalogHtml, "ProductImages");
catalogPdf.SaveAs("product-catalog.pdf");

Imports IronPdf
Imports IronPdf.Imaging ' Install-Package IronPdf
Imports System.IO

Private renderer = New ChromePdfRenderer()

' Convert single image to PDF
Private imagePath = "product-photo.jpg"
Private imageHtml = $"
    <html>
    <body style='margin: 0; padding: 0;'>
        <img src='{imagePath}' style='width: 100%; height: auto;' />
    </body>
    </html>"

Private imagePdf = renderer.RenderHtmlAsPdf(imageHtml, Path.GetDirectoryName(imagePath))
imagePdf.SaveAs("product-catalog-page.pdf")

' Create multi-page PDF from multiple images
Dim imageFiles = Directory.GetFiles("ProductImages", "*.jpg")
Dim catalogHtml = "<html><body style='margin: 0;'>"

For Each image In imageFiles
	catalogHtml &= $"
        <div style='page-break-after: always;'>
            <img src='{Path.GetFileName(image)}' style='width: 100%; height: auto;' />
            <p style='text-align: center;'>{Path.GetFileNameWithoutExtension(image)}</p>
        </div>"
Next image

catalogHtml &= "</body></html>"

Dim catalogPdf = renderer.RenderHtmlAsPdf(catalogHtml, "ProductImages")
catalogPdf.SaveAs("product-catalog.pdf")

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7. Generate PDF from ASP.NET Pages

For web applications, generating PDFs from your existing views provides a seamless way to create downloadable versions of web content. This integration capability is crucial for organizations that need to create PDFs from their web applications - whether it's customer portals generating statements, admin dashboards producing reports, or e-learning platforms creating certificates. IronPDF works with all ASP.NET technologies including MVC, Razor Pages, and Blazor, making it the perfect choice for organizations already invested in the Microsoft ecosystem:

// Namespace: Microsoft.AspNetCore.Mvc
using Microsoft.AspNetCore.Mvc;
// Namespace: IronPdf
using IronPdf;
// Namespace: System.Threading.Tasks
using System.Threading.Tasks;
// Namespace: System.IO
using System.IO;
// Namespace: System
using System;

// ASP.NET Core MVC Controller
public class ReportController : Controller
{
    private readonly ChromePdfRenderer _pdfRenderer;

    public ReportController()
    {
        _pdfRenderer = new ChromePdfRenderer();
    }

    public async Task<IActionResult> DownloadReport(int reportId)
    {
        // Get your report data
        var reportData = await GetReportData(reportId);

        // Render view to HTML string
        var html = await RenderViewToStringAsync("Reports/MonthlyReport", reportData);

        // Convert HTML content to PDF
        var pdf = _pdfRenderer.RenderHtmlAsPdf(html);

        // Return as file download
        return File(
            pdf.BinaryData, 
            "application/pdf", 
            $"report-{reportId}-{DateTime.Now:yyyy-MM}.pdf"
        );
    }

    private async Task<string> RenderViewToStringAsync(string viewName, object model)
    {
        ViewData.Model = model;
        using var sw = new StringWriter();
        var viewResult = ViewEngines.Engines.FindPartialView(ControllerContext, viewName);
        var viewContext = new ViewContext(
            ControllerContext, 
            viewResult.View, 
            ViewData, 
            TempData, 
            sw, 
            new HtmlHelperOptions()
        );
        viewResult.View.Render(viewContext, sw);
        return sw.GetStringBuilder().ToString();
    }
}

// Namespace: Microsoft.AspNetCore.Mvc
using Microsoft.AspNetCore.Mvc;
// Namespace: IronPdf
using IronPdf;
// Namespace: System.Threading.Tasks
using System.Threading.Tasks;
// Namespace: System.IO
using System.IO;
// Namespace: System
using System;

// ASP.NET Core MVC Controller
public class ReportController : Controller
{
    private readonly ChromePdfRenderer _pdfRenderer;

    public ReportController()
    {
        _pdfRenderer = new ChromePdfRenderer();
    }

    public async Task<IActionResult> DownloadReport(int reportId)
    {
        // Get your report data
        var reportData = await GetReportData(reportId);

        // Render view to HTML string
        var html = await RenderViewToStringAsync("Reports/MonthlyReport", reportData);

        // Convert HTML content to PDF
        var pdf = _pdfRenderer.RenderHtmlAsPdf(html);

        // Return as file download
        return File(
            pdf.BinaryData, 
            "application/pdf", 
            $"report-{reportId}-{DateTime.Now:yyyy-MM}.pdf"
        );
    }

    private async Task<string> RenderViewToStringAsync(string viewName, object model)
    {
        ViewData.Model = model;
        using var sw = new StringWriter();
        var viewResult = ViewEngines.Engines.FindPartialView(ControllerContext, viewName);
        var viewContext = new ViewContext(
            ControllerContext, 
            viewResult.View, 
            ViewData, 
            TempData, 
            sw, 
            new HtmlHelperOptions()
        );
        viewResult.View.Render(viewContext, sw);
        return sw.GetStringBuilder().ToString();
    }
}

' Namespace: Microsoft.AspNetCore.Mvc
Imports Microsoft.AspNetCore.Mvc
' Namespace: IronPdf
Imports IronPdf
' Namespace: System.Threading.Tasks
Imports System.Threading.Tasks
' Namespace: System.IO
Imports System.IO
' Namespace: System
Imports System

' ASP.NET Core MVC Controller
Public Class ReportController
	Inherits Controller

	Private ReadOnly _pdfRenderer As ChromePdfRenderer

	Public Sub New()
		_pdfRenderer = New ChromePdfRenderer()
	End Sub

	Public Async Function DownloadReport(ByVal reportId As Integer) As Task(Of IActionResult)
		' Get your report data
		Dim reportData = Await GetReportData(reportId)

		' Render view to HTML string
		Dim html = Await RenderViewToStringAsync("Reports/MonthlyReport", reportData)

		' Convert HTML content to PDF
		Dim pdf = _pdfRenderer.RenderHtmlAsPdf(html)

		' Return as file download
		Return File(pdf.BinaryData, "application/pdf", $"report-{reportId}-{DateTime.Now:yyyy-MM}.pdf")
	End Function

	Private Async Function RenderViewToStringAsync(ByVal viewName As String, ByVal model As Object) As Task(Of String)
		ViewData.Model = model
		Dim sw = New StringWriter()
		Dim viewResult = ViewEngines.Engines.FindPartialView(ControllerContext, viewName)
		Dim viewContext As New ViewContext(ControllerContext, viewResult.View, ViewData, TempData, sw, New HtmlHelperOptions())
		viewResult.View.Render(viewContext, sw)
		Return sw.GetStringBuilder().ToString()
	End Function
End Class

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How Can I Make My PDFs Look Professional?

Creating PDFs is one thing - making them look professional is what sets your application apart when you generate PDFs in .NET. Professional PDF documents require attention to detail in layout, typography, and branding consistency to create the right impression. With IronPDF's comprehensive styling options and advanced PDF features, you can create documents that match your corporate identity perfectly using this powerful C# PDF generator. The HTML to PDF conversion capabilities ensure your styled documents maintain their visual appeal when produced as PDFs. Let's explore the features that transform basic PDFs into polished, professional documents that impress clients and stakeholders.

Headers, Footers, and Page Numbers

Professional documents need consistent headers and footers that provide context and navigation. IronPDF offers both simple text-based and complex HTML-based options for headers and footers. This flexibility is why organizations choose IronPDF when they need to create branded PDF documents at scale. You can include dynamic content like page numbers, dates, and document titles - ensuring every generated PDF maintains professional standards:

using IronPdf;
using System;

var renderer = new ChromePdfRenderer();

// Simple text header and footer with page numbers
renderer.RenderingOptions.TextHeader = new TextHeaderFooter
{
    Text = "Confidential Report - {date}",
    DrawDividerLine = true,
    Font = "Arial",
    FontSize = 12
};

renderer.RenderingOptions.TextFooter = new TextHeaderFooter
{
    Text = "Page {page} of {total-pages}",
    DrawDividerLine = true,
    Font = "Arial", 
    FontSize = 10,
    CenterText = true
};

// HTML headers for complex layouts with logos
renderer.RenderingOptions.HtmlHeader = new HtmlHeaderFooter
{
    Html = @"
        <div style='display: flex; justify-content: space-between; align-items: center; padding: 10px 40px;'>
            <img src='logo.png' style='height: 40px;' />
            <div style='text-align: center;'>
                <h2 style='margin: 0; color: #333;'>Annual Report 2024</h2>
                <p style='margin: 0; font-size: 12px; color: #666;'>Confidential</p>
            </div>
            <div style='text-align: right; font-size: 11px; color: #666;'>
                Generated: {date}<br/>
                Department: Finance
            </div>
        </div>",
    Height = 80,
    LoadStylesAndCSSFromMainHtmlDocument = true
};

// Create your PDF with professional headers/footers
var html = @"<h1>Financial Overview</h1><p>Report content here...</p>";
var pdf = renderer.RenderHtmlAsPdf(html);
pdf.SaveAs("professional-report.pdf");

using IronPdf;
using System;

var renderer = new ChromePdfRenderer();

// Simple text header and footer with page numbers
renderer.RenderingOptions.TextHeader = new TextHeaderFooter
{
    Text = "Confidential Report - {date}",
    DrawDividerLine = true,
    Font = "Arial",
    FontSize = 12
};

renderer.RenderingOptions.TextFooter = new TextHeaderFooter
{
    Text = "Page {page} of {total-pages}",
    DrawDividerLine = true,
    Font = "Arial", 
    FontSize = 10,
    CenterText = true
};

// HTML headers for complex layouts with logos
renderer.RenderingOptions.HtmlHeader = new HtmlHeaderFooter
{
    Html = @"
        <div style='display: flex; justify-content: space-between; align-items: center; padding: 10px 40px;'>
            <img src='logo.png' style='height: 40px;' />
            <div style='text-align: center;'>
                <h2 style='margin: 0; color: #333;'>Annual Report 2024</h2>
                <p style='margin: 0; font-size: 12px; color: #666;'>Confidential</p>
            </div>
            <div style='text-align: right; font-size: 11px; color: #666;'>
                Generated: {date}<br/>
                Department: Finance
            </div>
        </div>",
    Height = 80,
    LoadStylesAndCSSFromMainHtmlDocument = true
};

// Create your PDF with professional headers/footers
var html = @"<h1>Financial Overview</h1><p>Report content here...</p>";
var pdf = renderer.RenderHtmlAsPdf(html);
pdf.SaveAs("professional-report.pdf");

Imports IronPdf
Imports System

Private renderer = New ChromePdfRenderer()

' Simple text header and footer with page numbers
renderer.RenderingOptions.TextHeader = New TextHeaderFooter With {
	.Text = "Confidential Report - {date}",
	.DrawDividerLine = True,
	.Font = "Arial",
	.FontSize = 12
}

renderer.RenderingOptions.TextFooter = New TextHeaderFooter With {
	.Text = "Page {page} of {total-pages}",
	.DrawDividerLine = True,
	.Font = "Arial",
	.FontSize = 10,
	.CenterText = True
}

' HTML headers for complex layouts with logos
renderer.RenderingOptions.HtmlHeader = New HtmlHeaderFooter With {
	.Html = "
        <div style='display: flex; justify-content: space-between; align-items: center; padding: 10px 40px;'>
            <img src='logo.png' style='height: 40px;' />
            <div style='text-align: center;'>
                <h2 style='margin: 0; color: #333;'>Annual Report 2024</h2>
                <p style='margin: 0; font-size: 12px; color: #666;'>Confidential</p>
            </div>
            <div style='text-align: right; font-size: 11px; color: #666;'>
                Generated: {date}<br/>
                Department: Finance
            </div>
        </div>",
	.Height = 80,
	.LoadStylesAndCSSFromMainHtmlDocument = True
}

' Create your PDF with professional headers/footers
Dim html = "<h1>Financial Overview</h1><p>Report content here...</p>"
Dim pdf = renderer.RenderHtmlAsPdf(html)
pdf.SaveAs("professional-report.pdf")

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These header and footer options enable organizations to maintain brand consistency across all generated PDFs. Whether you're creating financial reports or technical documentation, professional headers and footers ensure your documents meet corporate standards.

Advanced Page Setup and Layout Control

Control over page layout is crucial for creating documents that print correctly and look professional on all devices. IronPDF provides extensive options for page setup, including custom sizes, orientations, and margins:

var renderer = new ChromePdfRenderer();

// Configure page setup for professional printing
renderer.RenderingOptions.PaperSize = PdfPaperSize.A4;
renderer.RenderingOptions.PaperOrientation = PdfPaperOrientation.Portrait;

// Set margins in millimeters for precise control
renderer.RenderingOptions.MarginTop = 25;
renderer.RenderingOptions.MarginBottom = 25;
renderer.RenderingOptions.MarginLeft = 20;
renderer.RenderingOptions.MarginRight = 20;

// Enable background colors and images (important for branding)
renderer.RenderingOptions.PrintHtmlBackgrounds = true;

// Use screen media type for vibrant colors
renderer.RenderingOptions.CssMediaType = PdfCssMediaType.Screen;

// Custom page size for special documents
renderer.RenderingOptions.SetCustomPaperSizeinMilimeters(210, 297); // A4

// Enable high-quality rendering
renderer.RenderingOptions.RenderQuality = 100; // 0-100 scale

var renderer = new ChromePdfRenderer();

// Configure page setup for professional printing
renderer.RenderingOptions.PaperSize = PdfPaperSize.A4;
renderer.RenderingOptions.PaperOrientation = PdfPaperOrientation.Portrait;

// Set margins in millimeters for precise control
renderer.RenderingOptions.MarginTop = 25;
renderer.RenderingOptions.MarginBottom = 25;
renderer.RenderingOptions.MarginLeft = 20;
renderer.RenderingOptions.MarginRight = 20;

// Enable background colors and images (important for branding)
renderer.RenderingOptions.PrintHtmlBackgrounds = true;

// Use screen media type for vibrant colors
renderer.RenderingOptions.CssMediaType = PdfCssMediaType.Screen;

// Custom page size for special documents
renderer.RenderingOptions.SetCustomPaperSizeinMilimeters(210, 297); // A4

// Enable high-quality rendering
renderer.RenderingOptions.RenderQuality = 100; // 0-100 scale

Dim renderer = New ChromePdfRenderer()

' Configure page setup for professional printing
renderer.RenderingOptions.PaperSize = PdfPaperSize.A4
renderer.RenderingOptions.PaperOrientation = PdfPaperOrientation.Portrait

' Set margins in millimeters for precise control
renderer.RenderingOptions.MarginTop = 25
renderer.RenderingOptions.MarginBottom = 25
renderer.RenderingOptions.MarginLeft = 20
renderer.RenderingOptions.MarginRight = 20

' Enable background colors and images (important for branding)
renderer.RenderingOptions.PrintHtmlBackgrounds = True

' Use screen media type for vibrant colors
renderer.RenderingOptions.CssMediaType = PdfCssMediaType.Screen

' Custom page size for special documents
renderer.RenderingOptions.SetCustomPaperSizeinMilimeters(210, 297) ' A4

' Enable high-quality rendering
renderer.RenderingOptions.RenderQuality = 100 ' 0-100 scale

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Working with Fonts and Typography

Typography plays a crucial role in document professionalism. IronPDF supports web fonts, custom fonts, and advanced typography features:

var renderer = new ChromePdfRenderer();

// HTML with custom fonts and typography
var html = @"
    <html>
    <head>
        <link href='https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;700&display=swap' rel='stylesheet'>
        <style>
            @font-face {
                font-family: 'CustomBrand';
                src: url('BrandFont.ttf') format('truetype');
            }

            body {
                font-family: 'Roboto', Arial, sans-serif;
                font-size: 11pt;
                line-height: 1.6;
                color: #333;
            }

            h1 {
                font-family: 'CustomBrand', Georgia, serif;
                font-size: 28pt;
                color: #0066cc;
                letter-spacing: -0.5px;
            }

            .quote {
                font-style: italic;
                font-size: 14pt;
                color: #666;
                border-left: 4px solid #0066cc;
                padding-left: 20px;
                margin: 20px 0;
            }
        </style>
    </head>
    <body>
        <h1>Professional Document</h1>
        <p>This document demonstrates professional typography.</p>
        <div class='quote'>
            "Excellence in typography enhances readability and professionalism."
        </div>
    </body>
    </html>";

var pdf = renderer.RenderHtmlAsPdf(html, "Assets/Fonts");
pdf.SaveAs("typography-demo.pdf");

var renderer = new ChromePdfRenderer();

// HTML with custom fonts and typography
var html = @"
    <html>
    <head>
        <link href='https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;700&display=swap' rel='stylesheet'>
        <style>
            @font-face {
                font-family: 'CustomBrand';
                src: url('BrandFont.ttf') format('truetype');
            }

            body {
                font-family: 'Roboto', Arial, sans-serif;
                font-size: 11pt;
                line-height: 1.6;
                color: #333;
            }

            h1 {
                font-family: 'CustomBrand', Georgia, serif;
                font-size: 28pt;
                color: #0066cc;
                letter-spacing: -0.5px;
            }

            .quote {
                font-style: italic;
                font-size: 14pt;
                color: #666;
                border-left: 4px solid #0066cc;
                padding-left: 20px;
                margin: 20px 0;
            }
        </style>
    </head>
    <body>
        <h1>Professional Document</h1>
        <p>This document demonstrates professional typography.</p>
        <div class='quote'>
            "Excellence in typography enhances readability and professionalism."
        </div>
    </body>
    </html>";

var pdf = renderer.RenderHtmlAsPdf(html, "Assets/Fonts");
pdf.SaveAs("typography-demo.pdf");

Dim renderer = New ChromePdfRenderer()

' HTML with custom fonts and typography
Dim html = "
    <html>
    <head>
        <link href='https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;700&display=swap' rel='stylesheet'>
        <style>
            @font-face {
                font-family: 'CustomBrand';
                src: url('BrandFont.ttf') format('truetype');
            }

            body {
                font-family: 'Roboto', Arial, sans-serif;
                font-size: 11pt;
                line-height: 1.6;
                color: #333;
            }

            h1 {
                font-family: 'CustomBrand', Georgia, serif;
                font-size: 28pt;
                color: #0066cc;
                letter-spacing: -0.5px;
            }

            .quote {
                font-style: italic;
                font-size: 14pt;
                color: #666;
                border-left: 4px solid #0066cc;
                padding-left: 20px;
                margin: 20px 0;
            }
        </style>
    </head>
    <body>
        <h1>Professional Document</h1>
        <p>This document demonstrates professional typography.</p>
        <div class='quote'>
            "Excellence in typography enhances readability [and] professionalism." </div> </body> </html>"

Dim pdf = renderer.RenderHtmlAsPdf(html, "Assets/Fonts")
pdf.SaveAs("typography-demo.pdf")

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Real-World Example: How Do I Generate an Invoice PDF?

Let's create a complete, production-ready invoice generator that demonstrates best practices for creating PDF documents in real-world applications. This example showcases why thousands of businesses choose IronPDF as their C# PDF generator for invoice generation needs - it combines data binding, professional styling, and proper document structure in a way that's both powerful and maintainable. Similar implementations are used by e-commerce platforms to generate millions of invoices monthly, demonstrating the scalability of programmatic PDF generation in .NET. You can adapt this code for your own PDF creation tasks:

using IronPdf;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;

public class InvoiceGenerator
{
    private readonly ChromePdfRenderer _renderer;

    public InvoiceGenerator()
    {
        _renderer = new ChromePdfRenderer();
        ConfigureRenderer();
    }

    private void ConfigureRenderer()
    {
        // Professional page setup
        _renderer.RenderingOptions.PaperSize = PdfPaperSize.A4;
        _renderer.RenderingOptions.MarginTop = 25;
        _renderer.RenderingOptions.MarginBottom = 25;
        _renderer.RenderingOptions.MarginLeft = 25;
        _renderer.RenderingOptions.MarginRight = 25;
        _renderer.RenderingOptions.PrintHtmlBackgrounds = true;

        // Add footer with page numbers
        _renderer.RenderingOptions.TextFooter = new TextHeaderFooter
        {
            Text = "Page {page} of {total-pages} | Invoice generated on {date}",
            FontSize = 9,
            Font = "Arial",
            CenterText = true
        };
    }

    public void CreateInvoice(Invoice invoice)
    {
        var html = GenerateInvoiceHtml(invoice);
        var pdf = _renderer.RenderHtmlAsPdf(html);

        // Add metadata to the final document
        pdf.MetaData.Title = $"Invoice {invoice.Number}";
        pdf.MetaData.Author = "Your Company Name";
        pdf.MetaData.Subject = $"Invoice for {invoice.CustomerName}";
        pdf.MetaData.Keywords = "invoice, billing, payment";
        pdf.MetaData.CreationDate = DateTime.Now;

        // Save the PDF document
        var fileName = $"Invoice-{invoice.Number}.pdf";
        pdf.SaveAs(fileName);

        Console.WriteLine($"PDF generated successfully: {fileName}");
    }

    private string GenerateInvoiceHtml(Invoice invoice)
    {
        var itemsHtml = string.Join("", invoice.Items.Select(item => $@"
            <tr>
                <td style='padding: 12px; border-bottom: 1px solid #eee;'>{item.Description}</td>
                <td style='padding: 12px; border-bottom: 1px solid #eee; text-align: center;'>{item.Quantity}</td>
                <td style='padding: 12px; border-bottom: 1px solid #eee; text-align: right;'>${item.UnitPrice:F2}</td>
                <td style='padding: 12px; border-bottom: 1px solid #eee; text-align: right;'>${item.Total:F2}</td>
            </tr>"));

        return $@"
            <html>
            <head>
                <style>
                    * {{ box-sizing: border-box; }}
                    body {{ 
                        font-family: 'Segoe UI', Arial, sans-serif; 
                        line-height: 1.6;
                        color: #333;
                        margin: 0;
                        padding: 0;
                    }}
                    .invoice-container {{
                        max-width: 800px;
                        margin: 0 auto;
                        padding: 40px;
                    }}
                    .invoice-header {{
                        display: flex;
                        justify-content: space-between;
                        margin-bottom: 40px;
                        padding-bottom: 20px;
                        border-bottom: 3px solid #0066cc;
                    }}
                    .company-details {{
                        flex: 1;
                    }}
                    .company-details h1 {{
                        color: #0066cc;
                        margin: 0 0 10px 0;
                        font-size: 28px;
                    }}
                    .invoice-details {{
                        flex: 1;
                        text-align: right;
                    }}
                    .invoice-details h2 {{
                        margin: 0 0 10px 0;
                        color: #666;
                        font-size: 24px;
                    }}
                    .invoice-number {{
                        font-size: 18px;
                        color: #0066cc;
                        font-weight: bold;
                    }}
                    .billing-section {{
                        display: flex;
                        justify-content: space-between;
                        margin-bottom: 40px;
                    }}
                    .billing-box {{
                        flex: 1;
                        padding: 20px;
                        background: #f8f9fa;
                        border-radius: 8px;
                        margin-right: 20px;
                    }}
                    .billing-box:last-child {{
                        margin-right: 0;
                    }}
                    .billing-box h3 {{
                        margin: 0 0 15px 0;
                        color: #0066cc;
                        font-size: 16px;
                        text-transform: uppercase;
                        letter-spacing: 1px;
                    }}
                    .items-table {{
                        width: 100%;
                        border-collapse: collapse;
                        margin-bottom: 40px;
                    }}
                    .items-table th {{
                        background: #0066cc;
                        color: white;
                        padding: 12px;
                        text-align: left;
                        font-weight: 600;
                    }}
                    .items-table th:last-child {{
                        text-align: right;
                    }}
                    .totals-section {{
                        display: flex;
                        justify-content: flex-end;
                        margin-bottom: 40px;
                    }}
                    .totals-box {{
                        width: 300px;
                    }}
                    .total-row {{
                        display: flex;
                        justify-content: space-between;
                        padding: 8px 0;
                        border-bottom: 1px solid #eee;
                    }}
                    .total-row.final {{
                        border-bottom: none;
                        border-top: 2px solid #0066cc;
                        margin-top: 10px;
                        padding-top: 15px;
                        font-size: 20px;
                        font-weight: bold;
                        color: #0066cc;
                    }}
                    .payment-terms {{
                        background: #f8f9fa;
                        padding: 20px;
                        border-radius: 8px;
                        margin-bottom: 30px;
                    }}
                    .payment-terms h3 {{
                        margin: 0 0 10px 0;
                        color: #0066cc;
                    }}
                    .footer-note {{
                        text-align: center;
                        color: #666;
                        font-size: 14px;
                        margin-top: 40px;
                        padding-top: 20px;
                        border-top: 1px solid #eee;
                    }}
                </style>
            </head>
            <body>
                <div class='invoice-container'>
                    <div class='invoice-header'>
                        <div class='company-details'>
                            <h1>{invoice.CompanyName}</h1>
                            <p>{invoice.CompanyAddress}<br>
                            {invoice.CompanyCity}, {invoice.CompanyState} {invoice.CompanyZip}<br>
                            Phone: {invoice.CompanyPhone}<br>
                            Email: {invoice.CompanyEmail}</p>
                        </div>
                        <div class='invoice-details'>
                            <h2>INVOICE</h2>
                            <p class='invoice-number'>#{invoice.Number}</p>
                            <p><strong>Date:</strong> {invoice.Date:MMMM dd, yyyy}<br>
                            <strong>Due Date:</strong> {invoice.DueDate:MMMM dd, yyyy}</p>
                        </div>
                    </div>

                    <div class='billing-section'>
                        <div class='billing-box'>
                            <h3>Bill To</h3>
                            <p><strong>{invoice.CustomerName}</strong><br>
                            {invoice.CustomerAddress}<br>
                            {invoice.CustomerCity}, {invoice.CustomerState} {invoice.CustomerZip}<br>
                            {invoice.CustomerEmail}</p>
                        </div>
                        <div class='billing-box'>
                            <h3>Payment Information</h3>
                            <p><strong>Payment Terms:</strong> {invoice.PaymentTerms}<br>
                            <strong>Invoice Status:</strong> <span style='color: #ff6b6b;'>Unpaid</span><br>
                            <strong>Amount Due:</strong> ${invoice.Total:F2}</p>
                        </div>
                    </div>

                    <table class='items-table'>
                        <thead>
                            <tr>
                                <th>Description</th>
                                <th style='text-align: center;'>Quantity</th>
                                <th style='text-align: right;'>Unit Price</th>
                                <th style='text-align: right;'>Total</th>
                            </tr>
                        </thead>
                        <tbody>
                            {itemsHtml}
                        </tbody>
                    </table>

                    <div class='totals-section'>
                        <div class='totals-box'>
                            <div class='total-row'>
                                <span>Subtotal:</span>
                                <span>${invoice.Subtotal:F2}</span>
                            </div>
                            <div class='total-row'>
                                <span>Tax ({invoice.TaxRate:F0}%):</span>
                                <span>${invoice.Tax:F2}</span>
                            </div>
                            <div class='total-row final'>
                                <span>Total Due:</span>
                                <span>${invoice.Total:F2}</span>
                            </div>
                        </div>
                    </div>

                    <div class='payment-terms'>
                        <h3>Payment Terms & Conditions</h3>
                        <p>Payment is due within {invoice.PaymentTerms}. Late payments are subject to a 1.5% monthly service charge. 
                        Please make checks payable to {invoice.CompanyName} or pay online at {invoice.CompanyWebsite}.</p>
                    </div>

                    <div class='footer-note'>
                        <p>Thank you for your business! This invoice was generated automatically using our C# PDF generation system.</p>
                        <p>Questions? Contact us at {invoice.CompanyEmail} or {invoice.CompanyPhone}</p>
                    </div>
                </div>
            </body>
            </html>";
    }
}

// Invoice model classes
public class Invoice
{
    public string Number { get; set; }
    public DateTime Date { get; set; }
    public DateTime DueDate { get; set; }
    public string CompanyName { get; set; }
    public string CompanyAddress { get; set; }
    public string CompanyCity { get; set; }
    public string CompanyState { get; set; }
    public string CompanyZip { get; set; }
    public string CompanyPhone { get; set; }
    public string CompanyEmail { get; set; }
    public string CompanyWebsite { get; set; }
    public string CustomerName { get; set; }
    public string CustomerAddress { get; set; }
    public string CustomerCity { get; set; }
    public string CustomerState { get; set; }
    public string CustomerZip { get; set; }
    public string CustomerEmail { get; set; }
    public string PaymentTerms { get; set; }
    public List<InvoiceItem> Items { get; set; }
    public decimal Subtotal => Items.Sum(i => i.Total);
    public decimal TaxRate { get; set; }
    public decimal Tax => Subtotal * (TaxRate / 100);
    public decimal Total => Subtotal + Tax;
}

public class InvoiceItem
{
    public string Description { get; set; }
    public int Quantity { get; set; }
    public decimal UnitPrice { get; set; }
    public decimal Total => Quantity * UnitPrice;
}

// Usage example
var generator = new InvoiceGenerator();
var invoice = new Invoice
{
    Number = "INV-2024-001",
    Date = DateTime.Now,
    DueDate = DateTime.Now.AddDays(30),
    CompanyName = "Your Company Name",
    CompanyAddress = "123 Business Street",
    CompanyCity = "New York",
    CompanyState = "NY",
    CompanyZip = "10001",
    CompanyPhone = "(555) 123-4567",
    CompanyEmail = "billing@yourcompany.com",
    CompanyWebsite = "www.yourcompany.com",
    CustomerName = "Acme Corporation",
    CustomerAddress = "456 Client Avenue",
    CustomerCity = "Los Angeles",
    CustomerState = "CA",
    CustomerZip = "90001",
    CustomerEmail = "accounts@acmecorp.com",
    PaymentTerms = "Net 30",
    TaxRate = 8.5m,
    Items = new List<InvoiceItem>
    {
        new() { Description = "Professional Services - March 2024", Quantity = 40, UnitPrice = 125.00m },
        new() { Description = "Software License (Annual)", Quantity = 1, UnitPrice = 2400.00m },
        new() { Description = "Technical Support", Quantity = 10, UnitPrice = 150.00m }
    }
};

generator.CreateInvoice(invoice);

using IronPdf;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;

public class InvoiceGenerator
{
    private readonly ChromePdfRenderer _renderer;

    public InvoiceGenerator()
    {
        _renderer = new ChromePdfRenderer();
        ConfigureRenderer();
    }

    private void ConfigureRenderer()
    {
        // Professional page setup
        _renderer.RenderingOptions.PaperSize = PdfPaperSize.A4;
        _renderer.RenderingOptions.MarginTop = 25;
        _renderer.RenderingOptions.MarginBottom = 25;
        _renderer.RenderingOptions.MarginLeft = 25;
        _renderer.RenderingOptions.MarginRight = 25;
        _renderer.RenderingOptions.PrintHtmlBackgrounds = true;

        // Add footer with page numbers
        _renderer.RenderingOptions.TextFooter = new TextHeaderFooter
        {
            Text = "Page {page} of {total-pages} | Invoice generated on {date}",
            FontSize = 9,
            Font = "Arial",
            CenterText = true
        };
    }

    public void CreateInvoice(Invoice invoice)
    {
        var html = GenerateInvoiceHtml(invoice);
        var pdf = _renderer.RenderHtmlAsPdf(html);

        // Add metadata to the final document
        pdf.MetaData.Title = $"Invoice {invoice.Number}";
        pdf.MetaData.Author = "Your Company Name";
        pdf.MetaData.Subject = $"Invoice for {invoice.CustomerName}";
        pdf.MetaData.Keywords = "invoice, billing, payment";
        pdf.MetaData.CreationDate = DateTime.Now;

        // Save the PDF document
        var fileName = $"Invoice-{invoice.Number}.pdf";
        pdf.SaveAs(fileName);

        Console.WriteLine($"PDF generated successfully: {fileName}");
    }

    private string GenerateInvoiceHtml(Invoice invoice)
    {
        var itemsHtml = string.Join("", invoice.Items.Select(item => $@"
            <tr>
                <td style='padding: 12px; border-bottom: 1px solid #eee;'>{item.Description}</td>
                <td style='padding: 12px; border-bottom: 1px solid #eee; text-align: center;'>{item.Quantity}</td>
                <td style='padding: 12px; border-bottom: 1px solid #eee; text-align: right;'>${item.UnitPrice:F2}</td>
                <td style='padding: 12px; border-bottom: 1px solid #eee; text-align: right;'>${item.Total:F2}</td>
            </tr>"));

        return $@"
            <html>
            <head>
                <style>
                    * {{ box-sizing: border-box; }}
                    body {{ 
                        font-family: 'Segoe UI', Arial, sans-serif; 
                        line-height: 1.6;
                        color: #333;
                        margin: 0;
                        padding: 0;
                    }}
                    .invoice-container {{
                        max-width: 800px;
                        margin: 0 auto;
                        padding: 40px;
                    }}
                    .invoice-header {{
                        display: flex;
                        justify-content: space-between;
                        margin-bottom: 40px;
                        padding-bottom: 20px;
                        border-bottom: 3px solid #0066cc;
                    }}
                    .company-details {{
                        flex: 1;
                    }}
                    .company-details h1 {{
                        color: #0066cc;
                        margin: 0 0 10px 0;
                        font-size: 28px;
                    }}
                    .invoice-details {{
                        flex: 1;
                        text-align: right;
                    }}
                    .invoice-details h2 {{
                        margin: 0 0 10px 0;
                        color: #666;
                        font-size: 24px;
                    }}
                    .invoice-number {{
                        font-size: 18px;
                        color: #0066cc;
                        font-weight: bold;
                    }}
                    .billing-section {{
                        display: flex;
                        justify-content: space-between;
                        margin-bottom: 40px;
                    }}
                    .billing-box {{
                        flex: 1;
                        padding: 20px;
                        background: #f8f9fa;
                        border-radius: 8px;
                        margin-right: 20px;
                    }}
                    .billing-box:last-child {{
                        margin-right: 0;
                    }}
                    .billing-box h3 {{
                        margin: 0 0 15px 0;
                        color: #0066cc;
                        font-size: 16px;
                        text-transform: uppercase;
                        letter-spacing: 1px;
                    }}
                    .items-table {{
                        width: 100%;
                        border-collapse: collapse;
                        margin-bottom: 40px;
                    }}
                    .items-table th {{
                        background: #0066cc;
                        color: white;
                        padding: 12px;
                        text-align: left;
                        font-weight: 600;
                    }}
                    .items-table th:last-child {{
                        text-align: right;
                    }}
                    .totals-section {{
                        display: flex;
                        justify-content: flex-end;
                        margin-bottom: 40px;
                    }}
                    .totals-box {{
                        width: 300px;
                    }}
                    .total-row {{
                        display: flex;
                        justify-content: space-between;
                        padding: 8px 0;
                        border-bottom: 1px solid #eee;
                    }}
                    .total-row.final {{
                        border-bottom: none;
                        border-top: 2px solid #0066cc;
                        margin-top: 10px;
                        padding-top: 15px;
                        font-size: 20px;
                        font-weight: bold;
                        color: #0066cc;
                    }}
                    .payment-terms {{
                        background: #f8f9fa;
                        padding: 20px;
                        border-radius: 8px;
                        margin-bottom: 30px;
                    }}
                    .payment-terms h3 {{
                        margin: 0 0 10px 0;
                        color: #0066cc;
                    }}
                    .footer-note {{
                        text-align: center;
                        color: #666;
                        font-size: 14px;
                        margin-top: 40px;
                        padding-top: 20px;
                        border-top: 1px solid #eee;
                    }}
                </style>
            </head>
            <body>
                <div class='invoice-container'>
                    <div class='invoice-header'>
                        <div class='company-details'>
                            <h1>{invoice.CompanyName}</h1>
                            <p>{invoice.CompanyAddress}<br>
                            {invoice.CompanyCity}, {invoice.CompanyState} {invoice.CompanyZip}<br>
                            Phone: {invoice.CompanyPhone}<br>
                            Email: {invoice.CompanyEmail}</p>
                        </div>
                        <div class='invoice-details'>
                            <h2>INVOICE</h2>
                            <p class='invoice-number'>#{invoice.Number}</p>
                            <p><strong>Date:</strong> {invoice.Date:MMMM dd, yyyy}<br>
                            <strong>Due Date:</strong> {invoice.DueDate:MMMM dd, yyyy}</p>
                        </div>
                    </div>

                    <div class='billing-section'>
                        <div class='billing-box'>
                            <h3>Bill To</h3>
                            <p><strong>{invoice.CustomerName}</strong><br>
                            {invoice.CustomerAddress}<br>
                            {invoice.CustomerCity}, {invoice.CustomerState} {invoice.CustomerZip}<br>
                            {invoice.CustomerEmail}</p>
                        </div>
                        <div class='billing-box'>
                            <h3>Payment Information</h3>
                            <p><strong>Payment Terms:</strong> {invoice.PaymentTerms}<br>
                            <strong>Invoice Status:</strong> <span style='color: #ff6b6b;'>Unpaid</span><br>
                            <strong>Amount Due:</strong> ${invoice.Total:F2}</p>
                        </div>
                    </div>

                    <table class='items-table'>
                        <thead>
                            <tr>
                                <th>Description</th>
                                <th style='text-align: center;'>Quantity</th>
                                <th style='text-align: right;'>Unit Price</th>
                                <th style='text-align: right;'>Total</th>
                            </tr>
                        </thead>
                        <tbody>
                            {itemsHtml}
                        </tbody>
                    </table>

                    <div class='totals-section'>
                        <div class='totals-box'>
                            <div class='total-row'>
                                <span>Subtotal:</span>
                                <span>${invoice.Subtotal:F2}</span>
                            </div>
                            <div class='total-row'>
                                <span>Tax ({invoice.TaxRate:F0}%):</span>
                                <span>${invoice.Tax:F2}</span>
                            </div>
                            <div class='total-row final'>
                                <span>Total Due:</span>
                                <span>${invoice.Total:F2}</span>
                            </div>
                        </div>
                    </div>

                    <div class='payment-terms'>
                        <h3>Payment Terms & Conditions</h3>
                        <p>Payment is due within {invoice.PaymentTerms}. Late payments are subject to a 1.5% monthly service charge. 
                        Please make checks payable to {invoice.CompanyName} or pay online at {invoice.CompanyWebsite}.</p>
                    </div>

                    <div class='footer-note'>
                        <p>Thank you for your business! This invoice was generated automatically using our C# PDF generation system.</p>
                        <p>Questions? Contact us at {invoice.CompanyEmail} or {invoice.CompanyPhone}</p>
                    </div>
                </div>
            </body>
            </html>";
    }
}

// Invoice model classes
public class Invoice
{
    public string Number { get; set; }
    public DateTime Date { get; set; }
    public DateTime DueDate { get; set; }
    public string CompanyName { get; set; }
    public string CompanyAddress { get; set; }
    public string CompanyCity { get; set; }
    public string CompanyState { get; set; }
    public string CompanyZip { get; set; }
    public string CompanyPhone { get; set; }
    public string CompanyEmail { get; set; }
    public string CompanyWebsite { get; set; }
    public string CustomerName { get; set; }
    public string CustomerAddress { get; set; }
    public string CustomerCity { get; set; }
    public string CustomerState { get; set; }
    public string CustomerZip { get; set; }
    public string CustomerEmail { get; set; }
    public string PaymentTerms { get; set; }
    public List<InvoiceItem> Items { get; set; }
    public decimal Subtotal => Items.Sum(i => i.Total);
    public decimal TaxRate { get; set; }
    public decimal Tax => Subtotal * (TaxRate / 100);
    public decimal Total => Subtotal + Tax;
}

public class InvoiceItem
{
    public string Description { get; set; }
    public int Quantity { get; set; }
    public decimal UnitPrice { get; set; }
    public decimal Total => Quantity * UnitPrice;
}

// Usage example
var generator = new InvoiceGenerator();
var invoice = new Invoice
{
    Number = "INV-2024-001",
    Date = DateTime.Now,
    DueDate = DateTime.Now.AddDays(30),
    CompanyName = "Your Company Name",
    CompanyAddress = "123 Business Street",
    CompanyCity = "New York",
    CompanyState = "NY",
    CompanyZip = "10001",
    CompanyPhone = "(555) 123-4567",
    CompanyEmail = "billing@yourcompany.com",
    CompanyWebsite = "www.yourcompany.com",
    CustomerName = "Acme Corporation",
    CustomerAddress = "456 Client Avenue",
    CustomerCity = "Los Angeles",
    CustomerState = "CA",
    CustomerZip = "90001",
    CustomerEmail = "accounts@acmecorp.com",
    PaymentTerms = "Net 30",
    TaxRate = 8.5m,
    Items = new List<InvoiceItem>
    {
        new() { Description = "Professional Services - March 2024", Quantity = 40, UnitPrice = 125.00m },
        new() { Description = "Software License (Annual)", Quantity = 1, UnitPrice = 2400.00m },
        new() { Description = "Technical Support", Quantity = 10, UnitPrice = 150.00m }
    }
};

generator.CreateInvoice(invoice);

Imports IronPdf
Imports System
Imports System.Collections.Generic
Imports System.Globalization
Imports System.Linq

Public Class InvoiceGenerator
	Private ReadOnly _renderer As ChromePdfRenderer

	Public Sub New()
		_renderer = New ChromePdfRenderer()
		ConfigureRenderer()
	End Sub

	Private Sub ConfigureRenderer()
		' Professional page setup
		_renderer.RenderingOptions.PaperSize = PdfPaperSize.A4
		_renderer.RenderingOptions.MarginTop = 25
		_renderer.RenderingOptions.MarginBottom = 25
		_renderer.RenderingOptions.MarginLeft = 25
		_renderer.RenderingOptions.MarginRight = 25
		_renderer.RenderingOptions.PrintHtmlBackgrounds = True

		' Add footer with page numbers
		_renderer.RenderingOptions.TextFooter = New TextHeaderFooter With {
			.Text = "Page {page} of {total-pages} | Invoice generated on {date}",
			.FontSize = 9,
			.Font = "Arial",
			.CenterText = True
		}
	End Sub

	Public Sub CreateInvoice(ByVal invoice As Invoice)
		Dim html = GenerateInvoiceHtml(invoice)
		Dim pdf = _renderer.RenderHtmlAsPdf(html)

		' Add metadata to the final document
		pdf.MetaData.Title = $"Invoice {invoice.Number}"
		pdf.MetaData.Author = "Your Company Name"
		pdf.MetaData.Subject = $"Invoice for {invoice.CustomerName}"
		pdf.MetaData.Keywords = "invoice, billing, payment"
		pdf.MetaData.CreationDate = DateTime.Now

		' Save the PDF document
		Dim fileName = $"Invoice-{invoice.Number}.pdf"
		pdf.SaveAs(fileName)

		Console.WriteLine($"PDF generated successfully: {fileName}")
	End Sub

	Private Function GenerateInvoiceHtml(ByVal invoice As Invoice) As String
		Dim itemsHtml = String.Join("", invoice.Items.Select(Function(item) $"
            <tr>
                <td style='padding: 12px; border-bottom: 1px solid #eee;'>{item.Description}</td>
                <td style='padding: 12px; border-bottom: 1px solid #eee; text-align: center;'>{item.Quantity}</td>
                <td style='padding: 12px; border-bottom: 1px solid #eee; text-align: right;'>${item.UnitPrice:F2}</td>
                <td style='padding: 12px; border-bottom: 1px solid #eee; text-align: right;'>${item.Total:F2}</td>
            </tr>"))

		Return $"
            <html>
            <head>
                <style>
                    * {{ box-sizing: border-box; }}
                    body {{ 
                        font-family: 'Segoe UI', Arial, sans-serif; 
                        line-height: 1.6;
                        color: #333;
                        margin: 0;
                        padding: 0;
                    }}
                    .invoice-container {{
                        max-width: 800px;
                        margin: 0 auto;
                        padding: 40px;
                    }}
                    .invoice-header {{
                        display: flex;
                        justify-content: space-between;
                        margin-bottom: 40px;
                        padding-bottom: 20px;
                        border-bottom: 3px solid #0066cc;
                    }}
                    .company-details {{
                        flex: 1;
                    }}
                    .company-details h1 {{
                        color: #0066cc;
                        margin: 0 0 10px 0;
                        font-size: 28px;
                    }}
                    .invoice-details {{
                        flex: 1;
                        text-align: right;
                    }}
                    .invoice-details h2 {{
                        margin: 0 0 10px 0;
                        color: #666;
                        font-size: 24px;
                    }}
                    .invoice-number {{
                        font-size: 18px;
                        color: #0066cc;
                        font-weight: bold;
                    }}
                    .billing-section {{
                        display: flex;
                        justify-content: space-between;
                        margin-bottom: 40px;
                    }}
                    .billing-box {{
                        flex: 1;
                        padding: 20px;
                        background: #f8f9fa;
                        border-radius: 8px;
                        margin-right: 20px;
                    }}
                    .billing-box:last-child {{
                        margin-right: 0;
                    }}
                    .billing-box h3 {{
                        margin: 0 0 15px 0;
                        color: #0066cc;
                        font-size: 16px;
                        text-transform: uppercase;
                        letter-spacing: 1px;
                    }}
                    .items-table {{
                        width: 100%;
                        border-collapse: collapse;
                        margin-bottom: 40px;
                    }}
                    .items-table th {{
                        background: #0066cc;
                        color: white;
                        padding: 12px;
                        text-align: left;
                        font-weight: 600;
                    }}
                    .items-table th:last-child {{
                        text-align: right;
                    }}
                    .totals-section {{
                        display: flex;
                        justify-content: flex-end;
                        margin-bottom: 40px;
                    }}
                    .totals-box {{
                        width: 300px;
                    }}
                    .total-row {{
                        display: flex;
                        justify-content: space-between;
                        padding: 8px 0;
                        border-bottom: 1px solid #eee;
                    }}
                    .total-row.final {{
                        border-bottom: none;
                        border-top: 2px solid #0066cc;
                        margin-top: 10px;
                        padding-top: 15px;
                        font-size: 20px;
                        font-weight: bold;
                        color: #0066cc;
                    }}
                    .payment-terms {{
                        background: #f8f9fa;
                        padding: 20px;
                        border-radius: 8px;
                        margin-bottom: 30px;
                    }}
                    .payment-terms h3 {{
                        margin: 0 0 10px 0;
                        color: #0066cc;
                    }}
                    .footer-note {{
                        text-align: center;
                        color: #666;
                        font-size: 14px;
                        margin-top: 40px;
                        padding-top: 20px;
                        border-top: 1px solid #eee;
                    }}
                </style>
            </head>
            <body>
                <div class='invoice-container'>
                    <div class='invoice-header'>
                        <div class='company-details'>
                            <h1>{invoice.CompanyName}</h1>
                            <p>{invoice.CompanyAddress}<br>
                            {invoice.CompanyCity}, {invoice.CompanyState} {invoice.CompanyZip}<br>
                            Phone: {invoice.CompanyPhone}<br>
                            Email: {invoice.CompanyEmail}</p>
                        </div>
                        <div class='invoice-details'>
                            <h2>INVOICE</h2>
                            <p class='invoice-number'>#{invoice.Number}</p>
                            <p><strong>Date:</strong> {invoice.Date:=MMMM dd, yyyy}<br>
                            <strong>Due Date:</strong> {invoice.DueDate:=MMMM dd, yyyy}</p>
                        </div>
                    </div>

                    <div class='billing-section'>
                        <div class='billing-box'>
                            <h3>Bill To</h3>
                            <p><strong>{invoice.CustomerName}</strong><br>
                            {invoice.CustomerAddress}<br>
                            {invoice.CustomerCity}, {invoice.CustomerState} {invoice.CustomerZip}<br>
                            {invoice.CustomerEmail}</p>
                        </div>
                        <div class='billing-box'>
                            <h3>Payment Information</h3>
                            <p><strong>Payment Terms:</strong> {invoice.PaymentTerms}<br>
                            <strong>Invoice Status:</strong> <span style='color: #ff6b6b;'>Unpaid</span><br>
                            <strong>Amount Due:</strong> ${invoice.Total:F2}</p>
                        </div>
                    </div>

                    <table class='items-table'>
                        <thead>
                            <tr>
                                <th>Description</th>
                                <th style='text-align: center;'>Quantity</th>
                                <th style='text-align: right;'>Unit Price</th>
                                <th style='text-align: right;'>Total</th>
                            </tr>
                        </thead>
                        <tbody>
                            {itemsHtml}
                        </tbody>
                    </table>

                    <div class='totals-section'>
                        <div class='totals-box'>
                            <div class='total-row'>
                                <span>Subtotal:</span>
                                <span>${invoice.Subtotal:F2}</span>
                            </div>
                            <div class='total-row'>
                                <span>Tax ({invoice.TaxRate:F0}%):</span>
                                <span>${invoice.Tax:F2}</span>
                            </div>
                            <div class='total-row final'>
                                <span>Total Due:</span>
                                <span>${invoice.Total:F2}</span>
                            </div>
                        </div>
                    </div>

                    <div class='payment-terms'>
                        <h3>Payment Terms & Conditions</h3>
                        <p>Payment is due within {invoice.PaymentTerms}. Late payments are subject to a 1.5% monthly service charge. 
                        Please make checks payable to {invoice.CompanyName} or pay online at {invoice.CompanyWebsite}.</p>
                    </div>

                    <div class='footer-note'>
                        <p>Thank you for your business! This invoice was generated automatically using our C# PDF generation system.</p>
                        <p>Questions? Contact us at {invoice.CompanyEmail} or {invoice.CompanyPhone}</p>
                    </div>
                </div>
            </body>
            </html>"
	End Function
End Class

' Invoice model classes
Public Class Invoice
	Public Property Number() As String
	Public Property [Date]() As DateTime
	Public Property DueDate() As DateTime
	Public Property CompanyName() As String
	Public Property CompanyAddress() As String
	Public Property CompanyCity() As String
	Public Property CompanyState() As String
	Public Property CompanyZip() As String
	Public Property CompanyPhone() As String
	Public Property CompanyEmail() As String
	Public Property CompanyWebsite() As String
	Public Property CustomerName() As String
	Public Property CustomerAddress() As String
	Public Property CustomerCity() As String
	Public Property CustomerState() As String
	Public Property CustomerZip() As String
	Public Property CustomerEmail() As String
	Public Property PaymentTerms() As String
	Public Property Items() As List(Of InvoiceItem)
	Public ReadOnly Property Subtotal() As Decimal
		Get
			Return Items.Sum(Function(i) i.Total)
		End Get
	End Property
	Public Property TaxRate() As Decimal
	Public ReadOnly Property Tax() As Decimal
		Get
			Return Subtotal * (TaxRate / 100)
		End Get
	End Property
	Public ReadOnly Property Total() As Decimal
		Get
			Return Subtotal + Tax
		End Get
	End Property
End Class

Public Class InvoiceItem
	Public Property Description() As String
	Public Property Quantity() As Integer
	Public Property UnitPrice() As Decimal
	Public ReadOnly Property Total() As Decimal
		Get
			Return Quantity * UnitPrice
		End Get
	End Property
End Class

' Usage example
Private generator = New InvoiceGenerator()
Private invoice = New Invoice With {
	.Number = "INV-2024-001",
	.Date = DateTime.Now,
	.DueDate = DateTime.Now.AddDays(30),
	.CompanyName = "Your Company Name",
	.CompanyAddress = "123 Business Street",
	.CompanyCity = "New York",
	.CompanyState = "NY",
	.CompanyZip = "10001",
	.CompanyPhone = "(555) 123-4567",
	.CompanyEmail = "billing@yourcompany.com",
	.CompanyWebsite = "www.yourcompany.com",
	.CustomerName = "Acme Corporation",
	.CustomerAddress = "456 Client Avenue",
	.CustomerCity = "Los Angeles",
	.CustomerState = "CA",
	.CustomerZip = "90001",
	.CustomerEmail = "accounts@acmecorp.com",
	.PaymentTerms = "Net 30",
	.TaxRate = 8.5D,
	.Items = New List(Of InvoiceItem) From {
		New() {
			Description = "Professional Services - March 2024",
			Quantity = 40,
			UnitPrice = 125.00D
		},
		New() {
			Description = "Software License (Annual)",
			Quantity = 1,
			UnitPrice = 2400.00D
		},
		New() {
			Description = "Technical Support",
			Quantity = 10,
			UnitPrice = 150.00D
		}
	}
}

generator.CreateInvoice(invoice)

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What Advanced PDF Features Does IronPDF Offer?

IronPDF goes beyond basic PDF creation in C# to offer sophisticated features that enable complex document workflows and enterprise-grade functionality. These advanced capabilities allow you to create interactive forms, secure sensitive documents, and manipulate existing PDFs with precision when you build PDFs in .NET. These features are why over 14 million developers worldwide trust IronPDF for their mission-critical PDF generation needs. Understanding these features helps you build comprehensive PDF solutions that meet even the most demanding requirements - from creating fillable forms to implementing enterprise-grade security in your C# PDF creation projects.

Generate Interactive PDF Forms

Creating fillable PDF forms programmatically opens up possibilities for automating data collection and document workflows. IronPDF can transform HTML forms into interactive PDF forms that users can fill out in any PDF reader:

// Namespace: IronPdf
using IronPdf;
// Namespace: System
using System;

var renderer = new ChromePdfRenderer();

// Enable form creation from HTML
renderer.RenderingOptions.CreatePdfFormsFromHtml = true;

// Create an interactive form with various input types
var formHtml = @"
    <html>
    <head>
        <style>
            body { font-family: Arial, sans-serif; padding: 40px; }
            .form-group { margin-bottom: 20px; }
            label { display: block; margin-bottom: 5px; font-weight: bold; }
            input[type='text'], input[type='email'], select, textarea {
                width: 100%;
                padding: 8px;
                border: 1px solid #ccc;
                border-radius: 4px;
                font-size: 14px;
            }
            .checkbox-group { margin: 10px 0; }
            .submit-section { 
                margin-top: 30px; 
                padding-top: 20px; 
                border-top: 2px solid #0066cc; 
            }
        </style>
    </head>
    <body>
        <h1>Application Form</h1>
        <form>
            <div class='form-group'>
                <label for='fullName'>Full Name:</label>
                <input type='text' id='fullName' name='fullName' required />
            </div>

            <div class='form-group'>
                <label for='email'>Email Address:</label>
                <input type='email' id='email' name='email' required />
            </div>

            <div class='form-group'>
                <label for='department'>Department:</label>
                <select id='department' name='department'>
                    <option value=''>Select Department</option>
                    <option value='sales'>Sales</option>
                    <option value='marketing'>Marketing</option>
                    <option value='engineering'>Engineering</option>
                    <option value='hr'>Human Resources</option>
                </select>
            </div>

            <div class='form-group'>
                <label>Interests:</label>
                <div class='checkbox-group'>
                    <label><input type='checkbox' name='interests' value='training' /> Professional Training</label>
                    <label><input type='checkbox' name='interests' value='conferences' /> Industry Conferences</label>
                    <label><input type='checkbox' name='interests' value='certification' /> Certification Programs</label>
                </div>
            </div>

            <div class='form-group'>
                <label for='comments'>Additional Comments:</label>
                <textarea id='comments' name='comments' rows='4'></textarea>
            </div>

            <div class='submit-section'>
                <p><em>Please save this form and email to hr@company.com</em></p>
            </div>
        </form>
    </body>
    </html>";

// Create the PDF with form fields
var formPdf = renderer.RenderHtmlAsPdf(formHtml);

// Optionally pre-fill form fields programmatically
formPdf.Form.FindFormField("fullName").Value = "John Smith";
formPdf.Form.FindFormField("email").Value = "john.smith@example.com";
formPdf.Form.FindFormField("department").Value = "engineering";

// Save the interactive form
formPdf.SaveAs("application-form.pdf");

// You can also read and process submitted forms
var submittedPdf = PdfDocument.FromFile("submitted-form.pdf");
var name = submittedPdf.Form.FindFormField("fullName").Value;
var email = submittedPdf.Form.FindFormField("email").Value;
Console.WriteLine($"Form submitted by: {name} ({email})");

// Namespace: IronPdf
using IronPdf;
// Namespace: System
using System;

var renderer = new ChromePdfRenderer();

// Enable form creation from HTML
renderer.RenderingOptions.CreatePdfFormsFromHtml = true;

// Create an interactive form with various input types
var formHtml = @"
    <html>
    <head>
        <style>
            body { font-family: Arial, sans-serif; padding: 40px; }
            .form-group { margin-bottom: 20px; }
            label { display: block; margin-bottom: 5px; font-weight: bold; }
            input[type='text'], input[type='email'], select, textarea {
                width: 100%;
                padding: 8px;
                border: 1px solid #ccc;
                border-radius: 4px;
                font-size: 14px;
            }
            .checkbox-group { margin: 10px 0; }
            .submit-section { 
                margin-top: 30px; 
                padding-top: 20px; 
                border-top: 2px solid #0066cc; 
            }
        </style>
    </head>
    <body>
        <h1>Application Form</h1>
        <form>
            <div class='form-group'>
                <label for='fullName'>Full Name:</label>
                <input type='text' id='fullName' name='fullName' required />
            </div>

            <div class='form-group'>
                <label for='email'>Email Address:</label>
                <input type='email' id='email' name='email' required />
            </div>

            <div class='form-group'>
                <label for='department'>Department:</label>
                <select id='department' name='department'>
                    <option value=''>Select Department</option>
                    <option value='sales'>Sales</option>
                    <option value='marketing'>Marketing</option>
                    <option value='engineering'>Engineering</option>
                    <option value='hr'>Human Resources</option>
                </select>
            </div>

            <div class='form-group'>
                <label>Interests:</label>
                <div class='checkbox-group'>
                    <label><input type='checkbox' name='interests' value='training' /> Professional Training</label>
                    <label><input type='checkbox' name='interests' value='conferences' /> Industry Conferences</label>
                    <label><input type='checkbox' name='interests' value='certification' /> Certification Programs</label>
                </div>
            </div>

            <div class='form-group'>
                <label for='comments'>Additional Comments:</label>
                <textarea id='comments' name='comments' rows='4'></textarea>
            </div>

            <div class='submit-section'>
                <p><em>Please save this form and email to hr@company.com</em></p>
            </div>
        </form>
    </body>
    </html>";

// Create the PDF with form fields
var formPdf = renderer.RenderHtmlAsPdf(formHtml);

// Optionally pre-fill form fields programmatically
formPdf.Form.FindFormField("fullName").Value = "John Smith";
formPdf.Form.FindFormField("email").Value = "john.smith@example.com";
formPdf.Form.FindFormField("department").Value = "engineering";

// Save the interactive form
formPdf.SaveAs("application-form.pdf");

// You can also read and process submitted forms
var submittedPdf = PdfDocument.FromFile("submitted-form.pdf");
var name = submittedPdf.Form.FindFormField("fullName").Value;
var email = submittedPdf.Form.FindFormField("email").Value;
Console.WriteLine($"Form submitted by: {name} ({email})");

' Namespace: IronPdf
Imports IronPdf
' Namespace: System
Imports System

Private renderer = New ChromePdfRenderer()

' Enable form creation from HTML
renderer.RenderingOptions.CreatePdfFormsFromHtml = True

' Create an interactive form with various input types
Dim formHtml = "
    <html>
    <head>
        <style>
            body { font-family: Arial, sans-serif; padding: 40px; }
            .form-group { margin-bottom: 20px; }
            label { display: block; margin-bottom: 5px; font-weight: bold; }
            input[type='text'], input[type='email'], select, textarea {
                width: 100%;
                padding: 8px;
                border: 1px solid #ccc;
                border-radius: 4px;
                font-size: 14px;
            }
            .checkbox-group { margin: 10px 0; }
            .submit-section { 
                margin-top: 30px; 
                padding-top: 20px; 
                border-top: 2px solid #0066cc; 
            }
        </style>
    </head>
    <body>
        <h1>Application Form</h1>
        <form>
            <div class='form-group'>
                <label for='fullName'>Full Name:</label>
                <input type='text' id='fullName' name='fullName' required />
            </div>

            <div class='form-group'>
                <label for='email'>Email Address:</label>
                <input type='email' id='email' name='email' required />
            </div>

            <div class='form-group'>
                <label for='department'>Department:</label>
                <select id='department' name='department'>
                    <option value=''>Select Department</option>
                    <option value='sales'>Sales</option>
                    <option value='marketing'>Marketing</option>
                    <option value='engineering'>Engineering</option>
                    <option value='hr'>Human Resources</option>
                </select>
            </div>

            <div class='form-group'>
                <label>Interests:</label>
                <div class='checkbox-group'>
                    <label><input type='checkbox' name='interests' value='training' /> Professional Training</label>
                    <label><input type='checkbox' name='interests' value='conferences' /> Industry Conferences</label>
                    <label><input type='checkbox' name='interests' value='certification' /> Certification Programs</label>
                </div>
            </div>

            <div class='form-group'>
                <label for='comments'>Additional Comments:</label>
                <textarea id='comments' name='comments' rows='4'></textarea>
            </div>

            <div class='submit-section'>
                <p><em>Please save this form and email to hr@company.com</em></p>
            </div>
        </form>
    </body>
    </html>"

' Create the PDF with form fields
Dim formPdf = renderer.RenderHtmlAsPdf(formHtml)

' Optionally pre-fill form fields programmatically
formPdf.Form.FindFormField("fullName").Value = "John Smith"
formPdf.Form.FindFormField("email").Value = "john.smith@example.com"
formPdf.Form.FindFormField("department").Value = "engineering"

' Save the interactive form
formPdf.SaveAs("application-form.pdf")

' You can also read and process submitted forms
Dim submittedPdf = PdfDocument.FromFile("submitted-form.pdf")
Dim name = submittedPdf.Form.FindFormField("fullName").Value
Dim email = submittedPdf.Form.FindFormField("email").Value
Console.WriteLine($"Form submitted by: {name} ({email})")

$vbLabelText $csharpLabel

Secure Your Generated PDFs

Security is paramount when dealing with sensitive documents. IronPDF provides comprehensive security features to protect your PDFs from unauthorized access or modification:

// Namespace: IronPdf
using IronPdf;
// Namespace: IronPdf.Editing
using IronPdf.Editing;

var renderer = new ChromePdfRenderer();
var pdf = renderer.RenderHtmlAsPdf("<h1>Confidential Document</h1><p>Sensitive information...</p>");

// Apply password protection
pdf.SecuritySettings.UserPassword = "user123";      // Required to open
pdf.SecuritySettings.OwnerPassword = "owner456";    // Required to modify

// Set detailed permissions
pdf.SecuritySettings.AllowUserCopyPasteContent = false;
pdf.SecuritySettings.AllowUserAnnotations = false;
pdf.SecuritySettings.AllowUserFormData = true;
pdf.SecuritySettings.AllowUserPrinting = PrintPermissions.LowQualityPrint;

// Add digital signature for authenticity
pdf.SignWithFile(
    certificatePath: "certificate.pfx",
    certificatePassword: "certpass123",
    signingReason: "Document Approval",
    signingLocation: "New York, NY",
    signatureImage: new Signature("signature.png")
    {
        Width = 150,
        Height = 50
    }
);

// Apply redaction to hide sensitive information
pdf.RedactTextOnPage(
    pageIndex: 0,
    searchText: "SSN: ***-**-****",
    replacementText: "[REDACTED]",
    caseSensitive: false
);

// Save the secured PDF
pdf.SaveAs("secure-confidential.pdf");

// Namespace: IronPdf
using IronPdf;
// Namespace: IronPdf.Editing
using IronPdf.Editing;

var renderer = new ChromePdfRenderer();
var pdf = renderer.RenderHtmlAsPdf("<h1>Confidential Document</h1><p>Sensitive information...</p>");

// Apply password protection
pdf.SecuritySettings.UserPassword = "user123";      // Required to open
pdf.SecuritySettings.OwnerPassword = "owner456";    // Required to modify

// Set detailed permissions
pdf.SecuritySettings.AllowUserCopyPasteContent = false;
pdf.SecuritySettings.AllowUserAnnotations = false;
pdf.SecuritySettings.AllowUserFormData = true;
pdf.SecuritySettings.AllowUserPrinting = PrintPermissions.LowQualityPrint;

// Add digital signature for authenticity
pdf.SignWithFile(
    certificatePath: "certificate.pfx",
    certificatePassword: "certpass123",
    signingReason: "Document Approval",
    signingLocation: "New York, NY",
    signatureImage: new Signature("signature.png")
    {
        Width = 150,
        Height = 50
    }
);

// Apply redaction to hide sensitive information
pdf.RedactTextOnPage(
    pageIndex: 0,
    searchText: "SSN: ***-**-****",
    replacementText: "[REDACTED]",
    caseSensitive: false
);

// Save the secured PDF
pdf.SaveAs("secure-confidential.pdf");

' Namespace: IronPdf
Imports IronPdf
' Namespace: IronPdf.Editing
Imports IronPdf.Editing

Private renderer = New ChromePdfRenderer()
Private pdf = renderer.RenderHtmlAsPdf("<h1>Confidential Document</h1><p>Sensitive information...</p>")

' Apply password protection
pdf.SecuritySettings.UserPassword = "user123" ' Required to open
pdf.SecuritySettings.OwnerPassword = "owner456" ' Required to modify

' Set detailed permissions
pdf.SecuritySettings.AllowUserCopyPasteContent = False
pdf.SecuritySettings.AllowUserAnnotations = False
pdf.SecuritySettings.AllowUserFormData = True
pdf.SecuritySettings.AllowUserPrinting = PrintPermissions.LowQualityPrint

' Add digital signature for authenticity
pdf.SignWithFile(certificatePath:= "certificate.pfx", certificatePassword:= "certpass123", signingReason:= "Document Approval", signingLocation:= "New York, NY", signatureImage:= New Signature("signature.png") With {
	.Width = 150,
	.Height = 50
})

' Apply redaction to hide sensitive information
pdf.RedactTextOnPage(pageIndex:= 0, searchText:= "SSN: ***-**-****", replacementText:= "[REDACTED]", caseSensitive:= False)

' Save the secured PDF
pdf.SaveAs("secure-confidential.pdf")

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Merge and Split PDFs

Combining multiple PDFs or extracting specific pages is essential for document management workflows:

// Namespace: IronPdf
using IronPdf;
// Namespace: System
using System;

// Merge multiple PDFs into one document
var coverPage = new ChromePdfRenderer().RenderHtmlAsPdf("<h1>Annual Report 2024</h1>");
var introduction = PdfDocument.FromFile("introduction.pdf");
var financials = PdfDocument.FromFile("financials.pdf");
var appendix = PdfDocument.FromFile("appendix.pdf");

// Merge all documents
var completeReport = PdfDocument.Merge(coverPage, introduction, financials, appendix);

// Add page numbers to the merged document
for (int i = 0; i < completeReport.PageCount; i++)
{
    completeReport.AddTextFooterToPage(i, 
        $"Page {i + 1} of {completeReport.PageCount}", 
        IronPdf.Font.FontTypes.Arial, 
        10);
}

completeReport.SaveAs("annual-report-complete.pdf");

// Extract specific pages
var executiveSummary = completeReport.CopyPages(0, 4); // First 5 pages
executiveSummary.SaveAs("executive-summary.pdf");

// Split a large PDF into chapters
var sourcePdf = PdfDocument.FromFile("large-document.pdf");
var chaptersPerFile = 50;

for (int i = 0; i < sourcePdf.PageCount; i += chaptersPerFile)
{
    var endPage = Math.Min(i + chaptersPerFile - 1, sourcePdf.PageCount - 1);
    var chapter = sourcePdf.CopyPages(i, endPage);
    chapter.SaveAs($"chapter-{(i / chaptersPerFile) + 1}.pdf");
}

// Namespace: IronPdf
using IronPdf;
// Namespace: System
using System;

// Merge multiple PDFs into one document
var coverPage = new ChromePdfRenderer().RenderHtmlAsPdf("<h1>Annual Report 2024</h1>");
var introduction = PdfDocument.FromFile("introduction.pdf");
var financials = PdfDocument.FromFile("financials.pdf");
var appendix = PdfDocument.FromFile("appendix.pdf");

// Merge all documents
var completeReport = PdfDocument.Merge(coverPage, introduction, financials, appendix);

// Add page numbers to the merged document
for (int i = 0; i < completeReport.PageCount; i++)
{
    completeReport.AddTextFooterToPage(i, 
        $"Page {i + 1} of {completeReport.PageCount}", 
        IronPdf.Font.FontTypes.Arial, 
        10);
}

completeReport.SaveAs("annual-report-complete.pdf");

// Extract specific pages
var executiveSummary = completeReport.CopyPages(0, 4); // First 5 pages
executiveSummary.SaveAs("executive-summary.pdf");

// Split a large PDF into chapters
var sourcePdf = PdfDocument.FromFile("large-document.pdf");
var chaptersPerFile = 50;

for (int i = 0; i < sourcePdf.PageCount; i += chaptersPerFile)
{
    var endPage = Math.Min(i + chaptersPerFile - 1, sourcePdf.PageCount - 1);
    var chapter = sourcePdf.CopyPages(i, endPage);
    chapter.SaveAs($"chapter-{(i / chaptersPerFile) + 1}.pdf");
}

' Namespace: IronPdf
Imports IronPdf
' Namespace: System
Imports System

' Merge multiple PDFs into one document
Private coverPage = (New ChromePdfRenderer()).RenderHtmlAsPdf("<h1>Annual Report 2024</h1>")
Private introduction = PdfDocument.FromFile("introduction.pdf")
Private financials = PdfDocument.FromFile("financials.pdf")
Private appendix = PdfDocument.FromFile("appendix.pdf")

' Merge all documents
Private completeReport = PdfDocument.Merge(coverPage, introduction, financials, appendix)

' Add page numbers to the merged document
Dim i As Integer = 0
Do While i < completeReport.PageCount
	completeReport.AddTextFooterToPage(i, $"Page {i + 1} of {completeReport.PageCount}", IronPdf.Font.FontTypes.Arial, 10)
	i += 1
Loop

completeReport.SaveAs("annual-report-complete.pdf")

' Extract specific pages
Dim executiveSummary = completeReport.CopyPages(0, 4) ' First 5 pages
executiveSummary.SaveAs("executive-summary.pdf")

' Split a large PDF into chapters
Dim sourcePdf = PdfDocument.FromFile("large-document.pdf")
Dim chaptersPerFile = 50

For i As Integer = 0 To sourcePdf.PageCount - 1 Step chaptersPerFile
	Dim endPage = Math.Min(i + chaptersPerFile - 1, sourcePdf.PageCount - 1)
	Dim chapter = sourcePdf.CopyPages(i, endPage)
	chapter.SaveAs($"chapter-{(i \ chaptersPerFile) + 1}.pdf")
Next i

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Add Watermarks and Stamps

Watermarking PDFs is crucial for document control and branding. IronPDF supports both text and image watermarks:

// Namespace: IronPdf
using IronPdf;
// Namespace: System
using System;

var pdf = PdfDocument.FromFile("document.pdf");

// Add text watermark
pdf.ApplyWatermark(
    html: "<h1 style='color: #ff0000; opacity: 0.5; font-size: 100px;'>DRAFT</h1>",
    rotation: 45,
    opacity: 50,
    verticalAlignment: VerticalAlignment.Middle,
    horizontalAlignment: HorizontalAlignment.Center
);

// Add image watermark (company logo)
pdf.ApplyWatermark(
    html: "<img src='logo-watermark.png' style='width: 300px;' />",
    rotation: 0,
    opacity: 30,
    verticalAlignment: VerticalAlignment.Bottom,
    horizontalAlignment: HorizontalAlignment.Right
);

// Add stamps for document status
pdf.StampHtml(
    Html: @"<div style='border: 3px solid green; padding: 10px; 
            background: white; font-weight: bold; color: green;'>
            APPROVED<br/>
            " + DateTime.Now.ToString("MM/dd/yyyy") + @"
            </div>",
    X: 400,
    Y: 100,
    Width: 150,
    Height: 60,
    PageIndex: 0
);

pdf.SaveAs("watermarked-document.pdf");

// Namespace: IronPdf
using IronPdf;
// Namespace: System
using System;

var pdf = PdfDocument.FromFile("document.pdf");

// Add text watermark
pdf.ApplyWatermark(
    html: "<h1 style='color: #ff0000; opacity: 0.5; font-size: 100px;'>DRAFT</h1>",
    rotation: 45,
    opacity: 50,
    verticalAlignment: VerticalAlignment.Middle,
    horizontalAlignment: HorizontalAlignment.Center
);

// Add image watermark (company logo)
pdf.ApplyWatermark(
    html: "<img src='logo-watermark.png' style='width: 300px;' />",
    rotation: 0,
    opacity: 30,
    verticalAlignment: VerticalAlignment.Bottom,
    horizontalAlignment: HorizontalAlignment.Right
);

// Add stamps for document status
pdf.StampHtml(
    Html: @"<div style='border: 3px solid green; padding: 10px; 
            background: white; font-weight: bold; color: green;'>
            APPROVED<br/>
            " + DateTime.Now.ToString("MM/dd/yyyy") + @"
            </div>",
    X: 400,
    Y: 100,
    Width: 150,
    Height: 60,
    PageIndex: 0
);

pdf.SaveAs("watermarked-document.pdf");

' Namespace: IronPdf
Imports IronPdf
' Namespace: System
Imports System

Private pdf = PdfDocument.FromFile("document.pdf")

' Add text watermark
pdf.ApplyWatermark(html:= "<h1 style='color: #ff0000; opacity: 0.5; font-size: 100px;'>DRAFT</h1>", rotation:= 45, opacity:= 50, verticalAlignment:= VerticalAlignment.Middle, horizontalAlignment:= HorizontalAlignment.Center)

' Add image watermark (company logo)
pdf.ApplyWatermark(html:= "<img src='logo-watermark.png' style='width: 300px;' />", rotation:= 0, opacity:= 30, verticalAlignment:= VerticalAlignment.Bottom, horizontalAlignment:= HorizontalAlignment.Right)

' Add stamps for document status
pdf.StampHtml(Html:= "<div style='border: 3px solid green; padding: 10px; 
            background: white; font-weight: bold; color: green;'>
            APPROVED<br/>
            " & DateTime.Now.ToString("MM/dd/yyyy") & "
            </div>", X:= 400, Y:= 100, Width:= 150, Height:= 60, PageIndex:= 0)

pdf.SaveAs("watermarked-document.pdf")

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How Can I Optimize Performance When Generating PDFs at Scale?

When generating PDFs at scale, performance becomes critical. Whether you're creating thousands of invoices or processing large batch jobs, optimizing your PDF generation code can dramatically improve throughput and reduce resource consumption. Modern applications require efficient PDF creation in C# that doesn't block threads or consume excessive memory. Here are proven strategies for maximizing performance in your various PDF generation tasks when you need to produce PDFs in .NET efficiently.

Async PDF Generation

Modern applications require non-blocking operations to maintain responsiveness. IronPDF provides async methods for all major operations:

// Namespace: IronPdf
using IronPdf;
// Namespace: System.Threading.Tasks
using System.Threading.Tasks;
// Namespace: System.Collections.Generic
using System.Collections.Generic;
// Namespace: System.Linq
using System.Linq;
// Namespace: System
using System;
// Namespace: System.Threading
using System.Threading;

public class AsyncPdfService
{
    private readonly ChromePdfRenderer _renderer;

    public AsyncPdfService()
    {
        _renderer = new ChromePdfRenderer();
        // Configure renderer once for reuse
        _renderer.RenderingOptions.PaperSize = PdfPaperSize.A4;
    }

    public async Task<byte[]> GeneratePdfAsync(string html)
    {
        // Non-blocking PDF generation
        var pdf = await _renderer.RenderHtmlAsPdfAsync(html);
        return pdf.BinaryData;
    }

    public async Task GenerateBatchAsync(List<string> htmlDocuments)
    {
        // Process multiple PDFs concurrently
        var tasks = htmlDocuments.Select(async (html, index) =>
        {
            var pdf = await _renderer.RenderHtmlAsPdfAsync(html);
            await pdf.SaveAsAsync($"document-{index}.pdf");
        });

        await Task.WhenAll(tasks);
    }

    // Async with cancellation support
    public async Task<PdfDocument> GenerateWithTimeoutAsync(string html, int timeoutSeconds)
    {
        using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(timeoutSeconds));

        try
        {
            return await _renderer.RenderHtmlAsPdfAsync(html, cts.Token);
        }
        catch (OperationCanceledException)
        {
            throw new TimeoutException("PDF generation exceeded timeout");
        }
    }
}

// Namespace: IronPdf
using IronPdf;
// Namespace: System.Threading.Tasks
using System.Threading.Tasks;
// Namespace: System.Collections.Generic
using System.Collections.Generic;
// Namespace: System.Linq
using System.Linq;
// Namespace: System
using System;
// Namespace: System.Threading
using System.Threading;

public class AsyncPdfService
{
    private readonly ChromePdfRenderer _renderer;

    public AsyncPdfService()
    {
        _renderer = new ChromePdfRenderer();
        // Configure renderer once for reuse
        _renderer.RenderingOptions.PaperSize = PdfPaperSize.A4;
    }

    public async Task<byte[]> GeneratePdfAsync(string html)
    {
        // Non-blocking PDF generation
        var pdf = await _renderer.RenderHtmlAsPdfAsync(html);
        return pdf.BinaryData;
    }

    public async Task GenerateBatchAsync(List<string> htmlDocuments)
    {
        // Process multiple PDFs concurrently
        var tasks = htmlDocuments.Select(async (html, index) =>
        {
            var pdf = await _renderer.RenderHtmlAsPdfAsync(html);
            await pdf.SaveAsAsync($"document-{index}.pdf");
        });

        await Task.WhenAll(tasks);
    }

    // Async with cancellation support
    public async Task<PdfDocument> GenerateWithTimeoutAsync(string html, int timeoutSeconds)
    {
        using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(timeoutSeconds));

        try
        {
            return await _renderer.RenderHtmlAsPdfAsync(html, cts.Token);
        }
        catch (OperationCanceledException)
        {
            throw new TimeoutException("PDF generation exceeded timeout");
        }
    }
}

' Namespace: IronPdf
Imports IronPdf
' Namespace: System.Threading.Tasks
Imports System.Threading.Tasks
' Namespace: System.Collections.Generic
Imports System.Collections.Generic
' Namespace: System.Linq
Imports System.Linq
' Namespace: System
Imports System
' Namespace: System.Threading
Imports System.Threading

Public Class AsyncPdfService
	Private ReadOnly _renderer As ChromePdfRenderer

	Public Sub New()
		_renderer = New ChromePdfRenderer()
		' Configure renderer once for reuse
		_renderer.RenderingOptions.PaperSize = PdfPaperSize.A4
	End Sub

	Public Async Function GeneratePdfAsync(ByVal html As String) As Task(Of Byte())
		' Non-blocking PDF generation
		Dim pdf = Await _renderer.RenderHtmlAsPdfAsync(html)
		Return pdf.BinaryData
	End Function

	Public Async Function GenerateBatchAsync(ByVal htmlDocuments As List(Of String)) As Task
		' Process multiple PDFs concurrently
		Dim tasks = htmlDocuments.Select(Async Function(html, index)
			Dim pdf = Await _renderer.RenderHtmlAsPdfAsync(html)
			Await pdf.SaveAsAsync($"document-{index}.pdf")
		End Function)

		Await Task.WhenAll(tasks)
	End Function

	' Async with cancellation support
	Public Async Function GenerateWithTimeoutAsync(ByVal html As String, ByVal timeoutSeconds As Integer) As Task(Of PdfDocument)
		Dim cts = New CancellationTokenSource(TimeSpan.FromSeconds(timeoutSeconds))

		Try
			Return Await _renderer.RenderHtmlAsPdfAsync(html, cts.Token)
		Catch e1 As OperationCanceledException
			Throw New TimeoutException("PDF generation exceeded timeout")
		End Try
	End Function
End Class

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Batch Processing Best Practices

When processing multiple PDFs, proper resource management and parallel processing can significantly improve performance:

using IronPdf;
using System.Threading.Tasks.Dataflow;

public class BatchPdfProcessor
{
    private readonly ChromePdfRenderer _renderer;
    private readonly ActionBlock<PdfJob> _processingBlock;

    public BatchPdfProcessor(int maxConcurrency = 4)
    {
        _renderer = new ChromePdfRenderer();

        // Create a processing pipeline with controlled concurrency
        _processingBlock = new ActionBlock<PdfJob>(
            async job => await ProcessPdfAsync(job),
            new ExecutionDataflowBlockOptions
            {
                MaxDegreeOfParallelism = maxConcurrency,
                BoundedCapacity = maxConcurrency * 2
            });
    }

    private async Task ProcessPdfAsync(PdfJob job)
    {
        try
        {
            var pdf = await _renderer.RenderHtmlAsPdfAsync(job.Html);
            await pdf.SaveAsAsync(job.OutputPath);
            job.OnSuccess?.Invoke();
        }
        catch (Exception ex)
        {
            job.OnError?.Invoke(ex);
        }
    }

    public async Task<bool> QueuePdfAsync(PdfJob job)
    {
        return await _processingBlock.SendAsync(job);
    }

    public async Task CompleteAsync()
    {
        _processingBlock.Complete();
        await _processingBlock.Completion;
    }
}

public class PdfJob
{
    public string Html { get; set; }
    public string OutputPath { get; set; }
    public Action OnSuccess { get; set; }
    public Action<Exception> OnError { get; set; }
}

using IronPdf;
using System.Threading.Tasks.Dataflow;

public class BatchPdfProcessor
{
    private readonly ChromePdfRenderer _renderer;
    private readonly ActionBlock<PdfJob> _processingBlock;

    public BatchPdfProcessor(int maxConcurrency = 4)
    {
        _renderer = new ChromePdfRenderer();

        // Create a processing pipeline with controlled concurrency
        _processingBlock = new ActionBlock<PdfJob>(
            async job => await ProcessPdfAsync(job),
            new ExecutionDataflowBlockOptions
            {
                MaxDegreeOfParallelism = maxConcurrency,
                BoundedCapacity = maxConcurrency * 2
            });
    }

    private async Task ProcessPdfAsync(PdfJob job)
    {
        try
        {
            var pdf = await _renderer.RenderHtmlAsPdfAsync(job.Html);
            await pdf.SaveAsAsync(job.OutputPath);
            job.OnSuccess?.Invoke();
        }
        catch (Exception ex)
        {
            job.OnError?.Invoke(ex);
        }
    }

    public async Task<bool> QueuePdfAsync(PdfJob job)
    {
        return await _processingBlock.SendAsync(job);
    }

    public async Task CompleteAsync()
    {
        _processingBlock.Complete();
        await _processingBlock.Completion;
    }
}

public class PdfJob
{
    public string Html { get; set; }
    public string OutputPath { get; set; }
    public Action OnSuccess { get; set; }
    public Action<Exception> OnError { get; set; }
}

Imports IronPdf
Imports System.Threading.Tasks.Dataflow

Public Class BatchPdfProcessor
	Private ReadOnly _renderer As ChromePdfRenderer
	Private ReadOnly _processingBlock As ActionBlock(Of PdfJob)

	Public Sub New(Optional ByVal maxConcurrency As Integer = 4)
		_renderer = New ChromePdfRenderer()

		' Create a processing pipeline with controlled concurrency
		_processingBlock = New ActionBlock(Of PdfJob)(Async Function(job) Await ProcessPdfAsync(job), New ExecutionDataflowBlockOptions With {
			.MaxDegreeOfParallelism = maxConcurrency,
			.BoundedCapacity = maxConcurrency * 2
		})
	End Sub

	Private Async Function ProcessPdfAsync(ByVal job As PdfJob) As Task
		Try
			Dim pdf = Await _renderer.RenderHtmlAsPdfAsync(job.Html)
			Await pdf.SaveAsAsync(job.OutputPath)
			If job.OnSuccess IsNot Nothing Then
				job.OnSuccess.Invoke()
			End If
		Catch ex As Exception
			If job.OnError IsNot Nothing Then
				job.OnError.Invoke(ex)
			End If
		End Try
	End Function

	Public Async Function QueuePdfAsync(ByVal job As PdfJob) As Task(Of Boolean)
		Return Await _processingBlock.SendAsync(job)
	End Function

	Public Async Function CompleteAsync() As Task
		_processingBlock.Complete()
		Await _processingBlock.Completion
	End Function
End Class

Public Class PdfJob
	Public Property Html() As String
	Public Property OutputPath() As String
	Public Property OnSuccess() As Action
	Public Property OnError() As Action(Of Exception)
End Class

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Memory Optimization Techniques

For large PDFs or high-volume processing, memory management is crucial:

using IronPdf;

public class MemoryEfficientPdfGenerator
{
    private readonly ChromePdfRenderer _renderer;

    public MemoryEfficientPdfGenerator()
    {
        _renderer = new ChromePdfRenderer();

        // Optimize for memory usage
        _renderer.RenderingOptions.RenderQuality = 90; // Slightly lower quality for smaller size
        _renderer.RenderingOptions.ImageQuality = 85; // Compress images
    }

    // Stream large PDFs instead of loading into memory
    public async Task GenerateLargePdfToStreamAsync(string html, Stream outputStream)
    {
        var pdf = await _renderer.RenderHtmlAsPdfAsync(html);

        // Write directly to stream without keeping in memory
        using (pdf)
        {
            var bytes = pdf.BinaryData;
            await outputStream.WriteAsync(bytes, 0, bytes.Length);
        }
    }

    // Process large HTML in chunks
    public async Task<PdfDocument> GenerateFromChunksAsync(List<string> htmlChunks)
    {
        var pdfs = new List<PdfDocument>();

        try
        {
            // Generate each chunk separately
            foreach (var chunk in htmlChunks)
            {
                var chunkPdf = await _renderer.RenderHtmlAsPdfAsync(chunk);
                pdfs.Add(chunkPdf);
            }

            // Merge all chunks
            return PdfDocument.Merge(pdfs.ToArray());
        }
        finally
        {
            // Ensure all temporary PDFs are disposed
            foreach (var pdf in pdfs)
            {
                pdf?.Dispose();
            }
        }
    }
}

using IronPdf;

public class MemoryEfficientPdfGenerator
{
    private readonly ChromePdfRenderer _renderer;

    public MemoryEfficientPdfGenerator()
    {
        _renderer = new ChromePdfRenderer();

        // Optimize for memory usage
        _renderer.RenderingOptions.RenderQuality = 90; // Slightly lower quality for smaller size
        _renderer.RenderingOptions.ImageQuality = 85; // Compress images
    }

    // Stream large PDFs instead of loading into memory
    public async Task GenerateLargePdfToStreamAsync(string html, Stream outputStream)
    {
        var pdf = await _renderer.RenderHtmlAsPdfAsync(html);

        // Write directly to stream without keeping in memory
        using (pdf)
        {
            var bytes = pdf.BinaryData;
            await outputStream.WriteAsync(bytes, 0, bytes.Length);
        }
    }

    // Process large HTML in chunks
    public async Task<PdfDocument> GenerateFromChunksAsync(List<string> htmlChunks)
    {
        var pdfs = new List<PdfDocument>();

        try
        {
            // Generate each chunk separately
            foreach (var chunk in htmlChunks)
            {
                var chunkPdf = await _renderer.RenderHtmlAsPdfAsync(chunk);
                pdfs.Add(chunkPdf);
            }

            // Merge all chunks
            return PdfDocument.Merge(pdfs.ToArray());
        }
        finally
        {
            // Ensure all temporary PDFs are disposed
            foreach (var pdf in pdfs)
            {
                pdf?.Dispose();
            }
        }
    }
}

Imports IronPdf

Public Class MemoryEfficientPdfGenerator
	Private ReadOnly _renderer As ChromePdfRenderer

	Public Sub New()
		_renderer = New ChromePdfRenderer()

		' Optimize for memory usage
		_renderer.RenderingOptions.RenderQuality = 90 ' Slightly lower quality for smaller size
		_renderer.RenderingOptions.ImageQuality = 85 ' Compress images
	End Sub

	' Stream large PDFs instead of loading into memory
	Public Async Function GenerateLargePdfToStreamAsync(ByVal html As String, ByVal outputStream As Stream) As Task
		Dim pdf = Await _renderer.RenderHtmlAsPdfAsync(html)

		' Write directly to stream without keeping in memory
		Using pdf
			Dim bytes = pdf.BinaryData
			Await outputStream.WriteAsync(bytes, 0, bytes.Length)
		End Using
	End Function

	' Process large HTML in chunks
	Public Async Function GenerateFromChunksAsync(ByVal htmlChunks As List(Of String)) As Task(Of PdfDocument)
		Dim pdfs = New List(Of PdfDocument)()

		Try
			' Generate each chunk separately
			For Each chunk In htmlChunks
				Dim chunkPdf = Await _renderer.RenderHtmlAsPdfAsync(chunk)
				pdfs.Add(chunkPdf)
			Next chunk

			' Merge all chunks
			Return PdfDocument.Merge(pdfs.ToArray())
		Finally
			' Ensure all temporary PDFs are disposed
			For Each pdf In pdfs
				If pdf IsNot Nothing Then
					pdf.Dispose()
				End If
			Next pdf
		End Try
	End Function
End Class

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Caching and Template Optimization

Reduce rendering time by caching common elements and optimizing templates:

using IronPdf;
using Microsoft.Extensions.Caching.Memory;

public class CachedPdfService
{
    private readonly ChromePdfRenderer _renderer;
    private readonly IMemoryCache _cache;
    private readonly Dictionary<string, string> _compiledTemplates;

    public CachedPdfService(IMemoryCache cache)
    {
        _renderer = new ChromePdfRenderer();
        _cache = cache;
        _compiledTemplates = new Dictionary<string, string>();

        // Pre-compile common templates
        PrecompileTemplates();
    }

    private void PrecompileTemplates()
    {
        // Load and cache common CSS
        var commonCss = File.ReadAllText("Templates/common.css");
        _compiledTemplates["commonCss"] = commonCss;

        // Cache logo as Base64
        var logoBytes = File.ReadAllBytes("Assets/logo.png");
        var logoBase64 = Convert.ToBase64String(logoBytes);
        _compiledTemplates["logoData"] = $"data:image/png;base64,{logoBase64}";
    }

    public async Task<byte[]> GenerateInvoicePdfAsync(string invoiceId, InvoiceData data)
    {
        // Check cache first
        var cacheKey = $"invoice_{invoiceId}";
        if (_cache.TryGetValue<byte[]>(cacheKey, out var cachedPdf))
        {
            return cachedPdf;
        }

        // Generate PDF with cached templates
        var html = BuildHtmlWithCache(data);
        var pdf = await _renderer.RenderHtmlAsPdfAsync(html);
        var pdfBytes = pdf.BinaryData;

        // Cache for 1 hour
        _cache.Set(cacheKey, pdfBytes, TimeSpan.FromHours(1));

        return pdfBytes;
    }

    private string BuildHtmlWithCache(InvoiceData data)
    {
        return $@"
            <html>
            <head>
                <style>{_compiledTemplates["commonCss"]}</style>
            </head>
            <body>
                <img src='{_compiledTemplates["logoData"]}' />
                <!-- Rest of invoice HTML -->
            </body>
            </html>";
    }
}

using IronPdf;
using Microsoft.Extensions.Caching.Memory;

public class CachedPdfService
{
    private readonly ChromePdfRenderer _renderer;
    private readonly IMemoryCache _cache;
    private readonly Dictionary<string, string> _compiledTemplates;

    public CachedPdfService(IMemoryCache cache)
    {
        _renderer = new ChromePdfRenderer();
        _cache = cache;
        _compiledTemplates = new Dictionary<string, string>();

        // Pre-compile common templates
        PrecompileTemplates();
    }

    private void PrecompileTemplates()
    {
        // Load and cache common CSS
        var commonCss = File.ReadAllText("Templates/common.css");
        _compiledTemplates["commonCss"] = commonCss;

        // Cache logo as Base64
        var logoBytes = File.ReadAllBytes("Assets/logo.png");
        var logoBase64 = Convert.ToBase64String(logoBytes);
        _compiledTemplates["logoData"] = $"data:image/png;base64,{logoBase64}";
    }

    public async Task<byte[]> GenerateInvoicePdfAsync(string invoiceId, InvoiceData data)
    {
        // Check cache first
        var cacheKey = $"invoice_{invoiceId}";
        if (_cache.TryGetValue<byte[]>(cacheKey, out var cachedPdf))
        {
            return cachedPdf;
        }

        // Generate PDF with cached templates
        var html = BuildHtmlWithCache(data);
        var pdf = await _renderer.RenderHtmlAsPdfAsync(html);
        var pdfBytes = pdf.BinaryData;

        // Cache for 1 hour
        _cache.Set(cacheKey, pdfBytes, TimeSpan.FromHours(1));

        return pdfBytes;
    }

    private string BuildHtmlWithCache(InvoiceData data)
    {
        return $@"
            <html>
            <head>
                <style>{_compiledTemplates["commonCss"]}</style>
            </head>
            <body>
                <img src='{_compiledTemplates["logoData"]}' />
                <!-- Rest of invoice HTML -->
            </body>
            </html>";
    }
}

Imports IronPdf
Imports Microsoft.Extensions.Caching.Memory

Public Class CachedPdfService
	Private ReadOnly _renderer As ChromePdfRenderer
	Private ReadOnly _cache As IMemoryCache
	Private ReadOnly _compiledTemplates As Dictionary(Of String, String)

	Public Sub New(ByVal cache As IMemoryCache)
		_renderer = New ChromePdfRenderer()
		_cache = cache
		_compiledTemplates = New Dictionary(Of String, String)()

		' Pre-compile common templates
		PrecompileTemplates()
	End Sub

	Private Sub PrecompileTemplates()
		' Load and cache common CSS
		Dim commonCss = File.ReadAllText("Templates/common.css")
		_compiledTemplates("commonCss") = commonCss

		' Cache logo as Base64
		Dim logoBytes = File.ReadAllBytes("Assets/logo.png")
		Dim logoBase64 = Convert.ToBase64String(logoBytes)
		_compiledTemplates("logoData") = $"data:image/png;base64,{logoBase64}"
	End Sub

	Public Async Function GenerateInvoicePdfAsync(ByVal invoiceId As String, ByVal data As InvoiceData) As Task(Of Byte())
		' Check cache first
		Dim cacheKey = $"invoice_{invoiceId}"
		Dim cachedPdf As var
		If _cache.TryGetValue(Of Byte())(cacheKey, cachedPdf) Then
			Return cachedPdf
		End If

		' Generate PDF with cached templates
		Dim html = BuildHtmlWithCache(data)
		Dim pdf = Await _renderer.RenderHtmlAsPdfAsync(html)
		Dim pdfBytes = pdf.BinaryData

		' Cache for 1 hour
		_cache.Set(cacheKey, pdfBytes, TimeSpan.FromHours(1))

		Return pdfBytes
	End Function

	Private Function BuildHtmlWithCache(ByVal data As InvoiceData) As String
		Return $"
            <html>
            <head>
                <style>{_compiledTemplates("commonCss")}</style>ignoreignoreignore</head><body><img src='{_compiledTemplates("logoData")}' /><!-- Rest of invoice HTML --></body></html>"
	End Function
End Class

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What Are Common Issues When Creating PDFs and How Do I Fix Them?

Even with a robust .NET PDF library like IronPDF, you may encounter challenges during development or deployment when you build PDFs in C#. Understanding common issues and their solutions helps you quickly resolve problems and maintain smooth PDF generation operations. The good news is that with over 14 million developers using IronPDF as their C# PDF generator, most issues have been encountered and solved before. This troubleshooting guide covers the most frequent issues developers face when they create PDFs in .NET and provides practical solutions based on real-world experience. Remember, 24/7 support is always available if you need immediate assistance with your PDF creation challenges.

Issue 1: Failed Rendering or Blank PDFs

One of the most common issues is PDFs that appear blank or fail to render properly. This typically occurs when assets don't load in time or when there are JavaScript timing issues:

// Namespace: IronPdf
using IronPdf;
// Namespace: System.IO
using System.IO;
// Namespace: System
using System;

// Problem: PDF is blank or missing content
var renderer = new ChromePdfRenderer();
var pdf = renderer.RenderHtmlAsPdf(complexHtml); // Results in blank PDF

// Solution 1: Add render delay for JavaScript-heavy content
renderer.RenderingOptions.RenderDelay = 3000; // Wait 3 seconds
renderer.RenderingOptions.EnableJavaScript = true;

// Solution 2: Wait for specific elements
renderer.RenderingOptions.WaitFor = new WaitFor()
{
    JavaScriptQuery = "document.querySelector('#chart-loaded') !== null",
    WaitForType = WaitForType.JavaScript,
    Timeout = 30000 // 30 second timeout
};

// Solution 3: Use base path for local assets
var basePath = Path.GetFullPath("Assets");
var pdf = renderer.RenderHtmlAsPdf(htmlWithImages, basePath);

// Solution 4: Embed assets as Base64
var imageBase64 = Convert.ToBase64String(File.ReadAllBytes("logo.png"));
var htmlWithEmbedded = $@"<img src='data:image/png;base64,{imageBase64}' />";

// Namespace: IronPdf
using IronPdf;
// Namespace: System.IO
using System.IO;
// Namespace: System
using System;

// Problem: PDF is blank or missing content
var renderer = new ChromePdfRenderer();
var pdf = renderer.RenderHtmlAsPdf(complexHtml); // Results in blank PDF

// Solution 1: Add render delay for JavaScript-heavy content
renderer.RenderingOptions.RenderDelay = 3000; // Wait 3 seconds
renderer.RenderingOptions.EnableJavaScript = true;

// Solution 2: Wait for specific elements
renderer.RenderingOptions.WaitFor = new WaitFor()
{
    JavaScriptQuery = "document.querySelector('#chart-loaded') !== null",
    WaitForType = WaitForType.JavaScript,
    Timeout = 30000 // 30 second timeout
};

// Solution 3: Use base path for local assets
var basePath = Path.GetFullPath("Assets");
var pdf = renderer.RenderHtmlAsPdf(htmlWithImages, basePath);

// Solution 4: Embed assets as Base64
var imageBase64 = Convert.ToBase64String(File.ReadAllBytes("logo.png"));
var htmlWithEmbedded = $@"<img src='data:image/png;base64,{imageBase64}' />";

' Namespace: IronPdf
Imports IronPdf
' Namespace: System.IO
Imports System.IO
' Namespace: System
Imports System

' Problem: PDF is blank or missing content
Private renderer = New ChromePdfRenderer()
Private pdf = renderer.RenderHtmlAsPdf(complexHtml) ' Results in blank PDF

' Solution 1: Add render delay for JavaScript-heavy content
renderer.RenderingOptions.RenderDelay = 3000 ' Wait 3 seconds
renderer.RenderingOptions.EnableJavaScript = True

' Solution 2: Wait for specific elements
renderer.RenderingOptions.WaitFor = New WaitFor() With {
	.JavaScriptQuery = "document.querySelector('#chart-loaded') !== null",
	.WaitForType = WaitForType.JavaScript,
	.Timeout = 30000
}

' Solution 3: Use base path for local assets
Dim basePath = Path.GetFullPath("Assets")
Dim pdf = renderer.RenderHtmlAsPdf(htmlWithImages, basePath)

' Solution 4: Embed assets as Base64
Dim imageBase64 = Convert.ToBase64String(File.ReadAllBytes("logo.png"))
Dim htmlWithEmbedded = $"<img src='data:image/png;base64,{imageBase64}' />"

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For persistent rendering issues, enable logging to diagnose the problem:

// Enable detailed logging
IronPdf.Logging.Logger.EnableDebugging = true;
IronPdf.Logging.Logger.LogFilePath = "IronPdf.log";
IronPdf.Logging.Logger.LoggingMode = IronPdf.Logging.Logger.LoggingModes.All;

// Enable detailed logging
IronPdf.Logging.Logger.EnableDebugging = true;
IronPdf.Logging.Logger.LogFilePath = "IronPdf.log";
IronPdf.Logging.Logger.LoggingMode = IronPdf.Logging.Logger.LoggingModes.All;

' Enable detailed logging
IronPdf.Logging.Logger.EnableDebugging = True
IronPdf.Logging.Logger.LogFilePath = "IronPdf.log"
IronPdf.Logging.Logger.LoggingMode = IronPdf.Logging.Logger.LoggingModes.All

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Learn more about troubleshooting rendering issues

Issue 2: Slow Initial Render

The first PDF generation can be slower due to initialization overhead. IronPDF's initial render may take 2-3 seconds to execute, which is normal start-up time similar to Chrome opening on a desktop environment:

// Problem: First PDF takes too long to generate
public class PdfService
{
    private ChromePdfRenderer _renderer;

    // Solution 1: Initialize renderer at startup
    public void Initialize()
    {
        _renderer = new ChromePdfRenderer();

        // Warm up the renderer
        _ = _renderer.RenderHtmlAsPdf("<p>Warm up</p>");
    }

    // Solution 2: Use IronPdf.Native packages for faster initialization
    // Install-Package IronPdf.Native.Windows.X64
    // This includes pre-loaded binaries for your platform

    // Solution 3: For cloud deployments, use appropriate packages
    // For Linux: Install-Package IronPdf.Linux
    // For Docker: Use IronPdf.Linux with proper dependencies
}

// Solution 4: Skip initialization checks in production
IronPdf.Installation.SkipInitialization = true; // Use only with persistent storage

// Problem: First PDF takes too long to generate
public class PdfService
{
    private ChromePdfRenderer _renderer;

    // Solution 1: Initialize renderer at startup
    public void Initialize()
    {
        _renderer = new ChromePdfRenderer();

        // Warm up the renderer
        _ = _renderer.RenderHtmlAsPdf("<p>Warm up</p>");
    }

    // Solution 2: Use IronPdf.Native packages for faster initialization
    // Install-Package IronPdf.Native.Windows.X64
    // This includes pre-loaded binaries for your platform

    // Solution 3: For cloud deployments, use appropriate packages
    // For Linux: Install-Package IronPdf.Linux
    // For Docker: Use IronPdf.Linux with proper dependencies
}

// Solution 4: Skip initialization checks in production
IronPdf.Installation.SkipInitialization = true; // Use only with persistent storage

' Problem: First PDF takes too long to generate
Public Class PdfService
	Private _renderer As ChromePdfRenderer

	' Solution 1: Initialize renderer at startup
	Public Sub Initialize()
		_renderer = New ChromePdfRenderer()

		' Warm up the renderer
'INSTANT VB TODO TASK: Underscore 'discards' are not converted by Instant VB:
'ORIGINAL LINE: _ = _renderer.RenderHtmlAsPdf("<p>Warm up</p>");
		underscore = _renderer.RenderHtmlAsPdf("<p>Warm up</p>")
	End Sub

	' Solution 2: Use IronPdf.Native packages for faster initialization
	' Install-Package IronPdf.Native.Windows.X64
	' This includes pre-loaded binaries for your platform

	' Solution 3: For cloud deployments, use appropriate packages
	' For Linux: Install-Package IronPdf.Linux
	' For Docker: Use IronPdf.Linux with proper dependencies
End Class

' Solution 4: Skip initialization checks in production
IronPdf.Installation.SkipInitialization = True ' Use only with persistent storage

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Issue 3: Deployment Issues on Linux/Docker

IronPDF requires specific Linux dependencies that may not be present in minimal Docker images. Here's how to resolve common deployment issues:

# Dockerfile for IronPDF on Linux
FROM mcr.microsoft.com/dotnet/aspnet:8.0

# Install required dependencies
RUN apt-get update && apt-get install -y \
    libglib2.0-0 \
    libnss3 \
    libatk1.0-0 \
    libatk-bridge2.0-0 \
    libcups2 \
    libxkbcommon0 \
    libxcomposite1 \
    libxdamage1 \
    libxrandr2 \
    libgbm1 \
    libpango-1.0-0 \
    libcairo2 \
    libasound2 \
    libxshmfence1 \
    libx11-xcb1

# Copy and run your application
WORKDIR /app
COPY . .
ENTRYPOINT ["dotnet", "YourApp.dll"]

For Google Cloud Run specifically:

// Use 2nd generation execution environment
// Deploy with: gcloud run deploy --execution-environment gen2

// In your code, ensure compatibility
IronPdf.Installation.LinuxAndDockerDependenciesAutoConfig = true;
IronPdf.Installation.ChromeGpuMode = IronPdf.Engines.Chrome.ChromeGpuModes.Disabled;

// Use 2nd generation execution environment
// Deploy with: gcloud run deploy --execution-environment gen2

// In your code, ensure compatibility
IronPdf.Installation.LinuxAndDockerDependenciesAutoConfig = true;
IronPdf.Installation.ChromeGpuMode = IronPdf.Engines.Chrome.ChromeGpuModes.Disabled;

' Use 2nd generation execution environment
' Deploy with: gcloud run deploy --execution-environment gen2

' In your code, ensure compatibility
IronPdf.Installation.LinuxAndDockerDependenciesAutoConfig = True
IronPdf.Installation.ChromeGpuMode = IronPdf.Engines.Chrome.ChromeGpuModes.Disabled

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Learn more about Docker deployment

Issue 4: Memory and Performance Issues

For high-volume PDF generation, optimize memory usage and performance:

// Problem: High memory usage or slow batch processing
public class OptimizedPdfService
{
    private readonly ChromePdfRenderer _renderer;

    public OptimizedPdfService()
    {
        _renderer = new ChromePdfRenderer();

        // Optimize for performance
        _renderer.RenderingOptions.RenderQuality = 90;
        _renderer.RenderingOptions.ImageQuality = 85;

        // Disable features you don't need
        _renderer.RenderingOptions.EnableJavaScript = false; // If not needed
        _renderer.RenderingOptions.RenderDelay = 0; // If content is static
    }

    // Solution 1: Process large documents in chunks
    public async Task<PdfDocument> GenerateLargeReportAsync(List<ReportSection> sections)
    {
        var pdfs = new List<PdfDocument>();

        foreach (var section in sections)
        {
            var sectionHtml = GenerateSectionHtml(section);
            var sectionPdf = await _renderer.RenderHtmlAsPdfAsync(sectionHtml);
            pdfs.Add(sectionPdf);

            // Force garbage collection after each section
            if (pdfs.Count % 10 == 0)
            {
                GC.Collect();
                GC.WaitForPendingFinalizers();
            }
        }

        return PdfDocument.Merge(pdfs.ToArray());
    }

    // Solution 2: Use streaming for large files
    public async Task StreamLargePdfAsync(string html, HttpResponse response)
    {
        response.ContentType = "application/pdf";
        response.Headers.Add("Content-Disposition", "attachment; filename=report.pdf");

        var pdf = await _renderer.RenderHtmlAsPdfAsync(html);
        var bytes = pdf.BinaryData;

        await response.Body.WriteAsync(bytes, 0, bytes.Length);
        await response.Body.FlushAsync();
    }
}

// Problem: High memory usage or slow batch processing
public class OptimizedPdfService
{
    private readonly ChromePdfRenderer _renderer;

    public OptimizedPdfService()
    {
        _renderer = new ChromePdfRenderer();

        // Optimize for performance
        _renderer.RenderingOptions.RenderQuality = 90;
        _renderer.RenderingOptions.ImageQuality = 85;

        // Disable features you don't need
        _renderer.RenderingOptions.EnableJavaScript = false; // If not needed
        _renderer.RenderingOptions.RenderDelay = 0; // If content is static
    }

    // Solution 1: Process large documents in chunks
    public async Task<PdfDocument> GenerateLargeReportAsync(List<ReportSection> sections)
    {
        var pdfs = new List<PdfDocument>();

        foreach (var section in sections)
        {
            var sectionHtml = GenerateSectionHtml(section);
            var sectionPdf = await _renderer.RenderHtmlAsPdfAsync(sectionHtml);
            pdfs.Add(sectionPdf);

            // Force garbage collection after each section
            if (pdfs.Count % 10 == 0)
            {
                GC.Collect();
                GC.WaitForPendingFinalizers();
            }
        }

        return PdfDocument.Merge(pdfs.ToArray());
    }

    // Solution 2: Use streaming for large files
    public async Task StreamLargePdfAsync(string html, HttpResponse response)
    {
        response.ContentType = "application/pdf";
        response.Headers.Add("Content-Disposition", "attachment; filename=report.pdf");

        var pdf = await _renderer.RenderHtmlAsPdfAsync(html);
        var bytes = pdf.BinaryData;

        await response.Body.WriteAsync(bytes, 0, bytes.Length);
        await response.Body.FlushAsync();
    }
}

' Problem: High memory usage or slow batch processing
Public Class OptimizedPdfService
	Private ReadOnly _renderer As ChromePdfRenderer

	Public Sub New()
		_renderer = New ChromePdfRenderer()

		' Optimize for performance
		_renderer.RenderingOptions.RenderQuality = 90
		_renderer.RenderingOptions.ImageQuality = 85

		' Disable features you don't need
		_renderer.RenderingOptions.EnableJavaScript = False ' If not needed
		_renderer.RenderingOptions.RenderDelay = 0 ' If content is static
	End Sub

	' Solution 1: Process large documents in chunks
	Public Async Function GenerateLargeReportAsync(ByVal sections As List(Of ReportSection)) As Task(Of PdfDocument)
		Dim pdfs = New List(Of PdfDocument)()

		For Each section In sections
			Dim sectionHtml = GenerateSectionHtml(section)
			Dim sectionPdf = Await _renderer.RenderHtmlAsPdfAsync(sectionHtml)
			pdfs.Add(sectionPdf)

			' Force garbage collection after each section
			If pdfs.Count Mod 10 = 0 Then
				GC.Collect()
				GC.WaitForPendingFinalizers()
			End If
		Next section

		Return PdfDocument.Merge(pdfs.ToArray())
	End Function

	' Solution 2: Use streaming for large files
	Public Async Function StreamLargePdfAsync(ByVal html As String, ByVal response As HttpResponse) As Task
		response.ContentType = "application/pdf"
		response.Headers.Add("Content-Disposition", "attachment; filename=report.pdf")

		Dim pdf = Await _renderer.RenderHtmlAsPdfAsync(html)
		Dim bytes = pdf.BinaryData

		Await response.Body.WriteAsync(bytes, 0, bytes.Length)
		Await response.Body.FlushAsync()
	End Function
End Class

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Read the complete performance optimization guide

Issue 5: Font and Encoding Issues

When dealing with international content or custom fonts:

// Problem: Fonts not rendering correctly
var renderer = new ChromePdfRenderer();

// Solution 1: Install fonts on the server
// For Linux/Docker, add to Dockerfile:
// RUN apt-get install -y fonts-liberation fonts-noto

// Solution 2: Embed fonts in HTML
var html = @"
<html>
<head>
    <style>
        @font-face {
            font-family: 'CustomFont';
            src: url('data:font/woff2;base64,[base64-encoded-font]') format('woff2');
        }
        body { font-family: 'CustomFont', Arial, sans-serif; }
    </style>
</head>
<body>
    <p>Content with custom font</p>
</body>
</html>";

// Solution 3: Use web fonts
var htmlWithWebFont = @"
<html>
<head>
    <link href='https://fonts.googleapis.com/css2?family=Noto+Sans+JP' rel='stylesheet'>
    <style>
        body { font-family: 'Noto Sans JP', sans-serif; }
    </style>
</head>
<body>
    <p>日本語のテキスト</p>
</body>
</html>";

// Ensure proper encoding
renderer.RenderingOptions.InputEncoding = Encoding.UTF8;

// Problem: Fonts not rendering correctly
var renderer = new ChromePdfRenderer();

// Solution 1: Install fonts on the server
// For Linux/Docker, add to Dockerfile:
// RUN apt-get install -y fonts-liberation fonts-noto

// Solution 2: Embed fonts in HTML
var html = @"
<html>
<head>
    <style>
        @font-face {
            font-family: 'CustomFont';
            src: url('data:font/woff2;base64,[base64-encoded-font]') format('woff2');
        }
        body { font-family: 'CustomFont', Arial, sans-serif; }
    </style>
</head>
<body>
    <p>Content with custom font</p>
</body>
</html>";

// Solution 3: Use web fonts
var htmlWithWebFont = @"
<html>
<head>
    <link href='https://fonts.googleapis.com/css2?family=Noto+Sans+JP' rel='stylesheet'>
    <style>
        body { font-family: 'Noto Sans JP', sans-serif; }
    </style>
</head>
<body>
    <p>日本語のテキスト</p>
</body>
</html>";

// Ensure proper encoding
renderer.RenderingOptions.InputEncoding = Encoding.UTF8;

' Problem: Fonts not rendering correctly
Dim renderer = New ChromePdfRenderer()

' Solution 1: Install fonts on the server
' For Linux/Docker, add to Dockerfile:
' RUN apt-get install -y fonts-liberation fonts-noto

' Solution 2: Embed fonts in HTML
Dim html = "
<html>
<head>
    <style>
        @font-face {
            font-family: 'CustomFont';
            src: url('data:font/woff2;base64,[base64-encoded-font]') format('woff2');
        }
        body { font-family: 'CustomFont', Arial, sans-serif; }
    </style>
</head>
<body>
    <p>Content with custom font</p>
</body>
</html>"

' Solution 3: Use web fonts
Dim htmlWithWebFont = "
<html>
<head>
    <link href='https://fonts.googleapis.com/css2?family=Noto+Sans+JP' rel='stylesheet'>
    <style>
        body { font-family: 'Noto Sans JP', sans-serif; }
    </style>
</head>
<body>
    <p>日本語のテキスト</p>
</body>
</html>"

' Ensure proper encoding
renderer.RenderingOptions.InputEncoding = Encoding.UTF8

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Getting Help

If you encounter issues not covered here, IronPDF provides excellent support resources:

24/7 Live Chat Support - Talk to engineers in real-time with 30-second response time
Comprehensive Documentation - Detailed API references and guides
Knowledge Base - Solutions to common problems
Code Examples - Ready-to-use code snippets

When requesting support, include:

IronPDF version
.NET version and platform
Minimal code example reproducing the issue
Log files (if available)
Stack trace or error messages

Which Platforms Support IronPDF for PDF Generation?

IronPDF's cross-platform support ensures your PDF generation code works consistently across different environments. Whether you're deploying to Windows servers, Linux containers, or cloud platforms, IronPDF provides the flexibility and reliability needed for production deployments of your C# PDF generator. This universal compatibility is one reason why organizations across 50+ countries rely on IronPDF to generate millions of PDFs daily. From Fortune 500 companies creating financial reports to startups producing customer invoices, IronPDF scales to meet any demand for PDF creation in .NET. Understanding platform-specific considerations helps ensure smooth deployments across your infrastructure - whether that's on-premise servers or cloud environments where you need to build PDFs with C#.

.NET Version Compatibility

IronPDF supports all modern .NET versions and is continuously updated to support the latest releases:

.NET 8 - Full support with all features
.NET 9 - Fully supported (current latest version)
.NET 10 - Pre-release support available (IronPDF is already compliant for the November 2025 release)
.NET 7, 6, 5 - Fully supported
.NET Core 3.1+ - Supported with all features
.NET Framework 4.6.2+ - Legacy support maintained

Operating System Support

Deploy your PDF generation solution on any major operating system:

Windows

Windows 11, 10, 8, 7
Windows Server 2022, 2019, 2016, 2012

Linux

Ubuntu 20.04, 22.04, 24.04
Debian 10, 11, 12
CentOS 7, 8
Red Hat Enterprise Linux
Alpine Linux (with additional configuration)

macOS

macOS 13 (Ventura) and newer
Apple Silicon (M1/M2/M3) native support
Intel-based Macs fully supported

Cloud Platform Deployment

IronPDF works seamlessly on all major cloud platforms:

Microsoft Azure

// Azure App Service configuration
// Use at least B1 tier for optimal performance
// Enable 64-bit platform in Configuration settings

// For Azure Functions
public static class PdfFunction
{
    [FunctionName("GeneratePdf")]
    public static async Task<IActionResult> Run(
        [HttpTrigger(AuthorizationLevel.Function, "post")] HttpRequest req)
    {
        var renderer = new ChromePdfRenderer();
        var html = await new StreamReader(req.Body).ReadToEndAsync();
        var pdf = await renderer.RenderHtmlAsPdfAsync(html);

        return new FileContentResult(pdf.BinaryData, "application/pdf");
    }
}

// Azure App Service configuration
// Use at least B1 tier for optimal performance
// Enable 64-bit platform in Configuration settings

// For Azure Functions
public static class PdfFunction
{
    [FunctionName("GeneratePdf")]
    public static async Task<IActionResult> Run(
        [HttpTrigger(AuthorizationLevel.Function, "post")] HttpRequest req)
    {
        var renderer = new ChromePdfRenderer();
        var html = await new StreamReader(req.Body).ReadToEndAsync();
        var pdf = await renderer.RenderHtmlAsPdfAsync(html);

        return new FileContentResult(pdf.BinaryData, "application/pdf");
    }
}

' Azure App Service configuration
' Use at least B1 tier for optimal performance
' Enable 64-bit platform in Configuration settings

' For Azure Functions
Public Module PdfFunction
	<FunctionName("GeneratePdf")>
	Public Async Function Run(<HttpTrigger(AuthorizationLevel.Function, "post")> ByVal req As HttpRequest) As Task(Of IActionResult)
		Dim renderer = New ChromePdfRenderer()
		Dim html = Await (New StreamReader(req.Body)).ReadToEndAsync()
		Dim pdf = Await renderer.RenderHtmlAsPdfAsync(html)

		Return New FileContentResult(pdf.BinaryData, "application/pdf")
	End Function
End Module

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Amazon Web Services (AWS)

// AWS Lambda configuration
// Use custom runtime or container deployment
// Ensure Lambda has at least 512MB memory

public class PdfLambdaFunction
{
    private readonly ChromePdfRenderer _renderer;

    public PdfLambdaFunction()
    {
        _renderer = new ChromePdfRenderer();
        // Configure for Lambda environment
        IronPdf.Installation.ChromeGpuMode = IronPdf.Engines.Chrome.ChromeGpuModes.Disabled;
    }

    public async Task<APIGatewayProxyResponse> FunctionHandler(
        APIGatewayProxyRequest request, 
        ILambdaContext context)
    {
        var pdf = await _renderer.RenderHtmlAsPdfAsync(request.Body);

        return new APIGatewayProxyResponse
        {
            StatusCode = 200,
            Headers = new Dictionary<string, string> 
            { 
                { "Content-Type", "application/pdf" } 
            },
            Body = Convert.ToBase64String(pdf.BinaryData),
            IsBase64Encoded = true
        };
    }
}

// AWS Lambda configuration
// Use custom runtime or container deployment
// Ensure Lambda has at least 512MB memory

public class PdfLambdaFunction
{
    private readonly ChromePdfRenderer _renderer;

    public PdfLambdaFunction()
    {
        _renderer = new ChromePdfRenderer();
        // Configure for Lambda environment
        IronPdf.Installation.ChromeGpuMode = IronPdf.Engines.Chrome.ChromeGpuModes.Disabled;
    }

    public async Task<APIGatewayProxyResponse> FunctionHandler(
        APIGatewayProxyRequest request, 
        ILambdaContext context)
    {
        var pdf = await _renderer.RenderHtmlAsPdfAsync(request.Body);

        return new APIGatewayProxyResponse
        {
            StatusCode = 200,
            Headers = new Dictionary<string, string> 
            { 
                { "Content-Type", "application/pdf" } 
            },
            Body = Convert.ToBase64String(pdf.BinaryData),
            IsBase64Encoded = true
        };
    }
}

' AWS Lambda configuration
' Use custom runtime or container deployment
' Ensure Lambda has at least 512MB memory

Public Class PdfLambdaFunction
	Private ReadOnly _renderer As ChromePdfRenderer

	Public Sub New()
		_renderer = New ChromePdfRenderer()
		' Configure for Lambda environment
		IronPdf.Installation.ChromeGpuMode = IronPdf.Engines.Chrome.ChromeGpuModes.Disabled
	End Sub

	Public Async Function FunctionHandler(ByVal request As APIGatewayProxyRequest, ByVal context As ILambdaContext) As Task(Of APIGatewayProxyResponse)
		Dim pdf = Await _renderer.RenderHtmlAsPdfAsync(request.Body)

		Return New APIGatewayProxyResponse With {
			.StatusCode = 200,
			.Headers = New Dictionary(Of String, String) From {
				{"Content-Type", "application/pdf"}
			},
			.Body = Convert.ToBase64String(pdf.BinaryData),
			.IsBase64Encoded = True
		}
	End Function
End Class

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Google Cloud Platform

# app.yaml for App Engine
runtime: aspnetcore
env: flex

# Use 2nd generation for Cloud Run
# Deploy with: gcloud run deploy --execution-environment gen2

# app.yaml for App Engine
runtime: aspnetcore
env: flex

# Use 2nd generation for Cloud Run
# Deploy with: gcloud run deploy --execution-environment gen2

YAML

Container Deployment (Docker/Kubernetes)

IronPDF is container-ready with full Docker and Kubernetes support:

# Multi-stage Dockerfile for optimal size
FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
WORKDIR /src
COPY ["YourApp.csproj", "./"]
RUN dotnet restore
COPY . .
RUN dotnet publish -c Release -o /app/publish

FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS final
WORKDIR /app

# Install IronPDF dependencies
RUN apt-get update && apt-get install -y \
    libglib2.0-0 libnss3 libatk1.0-0 libatk-bridge2.0-0 \
    libcups2 libxkbcommon0 libxcomposite1 libxdamage1 \
    libxrandr2 libgbm1 libpango-1.0-0 libcairo2 libasound2

COPY --from=build /app/publish .
ENTRYPOINT ["dotnet", "YourApp.dll"]

Desktop Application Support

IronPDF works with all major .NET desktop frameworks:

WPF (Windows Presentation Foundation)

public partial class MainWindow : Window
{
    private async void GeneratePdfButton_Click(object sender, RoutedEventArgs e)
    {
        var renderer = new ChromePdfRenderer();
        var html = HtmlEditor.Text;

        var pdf = await renderer.RenderHtmlAsPdfAsync(html);

        var saveDialog = new SaveFileDialog
        {
            Filter = "PDF files (*.pdf)|*.pdf",
            DefaultExt = "pdf"
        };

        if (saveDialog.ShowDialog() == true)
        {
            pdf.SaveAs(saveDialog.FileName);
            MessageBox.Show("PDF saved successfully!");
        }
    }
}

public partial class MainWindow : Window
{
    private async void GeneratePdfButton_Click(object sender, RoutedEventArgs e)
    {
        var renderer = new ChromePdfRenderer();
        var html = HtmlEditor.Text;

        var pdf = await renderer.RenderHtmlAsPdfAsync(html);

        var saveDialog = new SaveFileDialog
        {
            Filter = "PDF files (*.pdf)|*.pdf",
            DefaultExt = "pdf"
        };

        if (saveDialog.ShowDialog() == true)
        {
            pdf.SaveAs(saveDialog.FileName);
            MessageBox.Show("PDF saved successfully!");
        }
    }
}

Partial Public Class MainWindow
	Inherits Window

	Private Async Sub GeneratePdfButton_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)
		Dim renderer = New ChromePdfRenderer()
		Dim html = HtmlEditor.Text

		Dim pdf = Await renderer.RenderHtmlAsPdfAsync(html)

		Dim saveDialog = New SaveFileDialog With {
			.Filter = "PDF files (*.pdf)|*.pdf",
			.DefaultExt = "pdf"
		}

		If saveDialog.ShowDialog() = True Then
			pdf.SaveAs(saveDialog.FileName)
			MessageBox.Show("PDF saved successfully!")
		End If
	End Sub
End Class

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Windows Forms

public partial class PdfGeneratorForm : Form
{
    private void btnGeneratePdf_Click(object sender, EventArgs e)
    {
        var renderer = new ChromePdfRenderer();
        var pdf = renderer.RenderHtmlAsPdf(txtHtml.Text);

        using (var saveDialog = new SaveFileDialog())
        {
            saveDialog.Filter = "PDF files|*.pdf";
            if (saveDialog.ShowDialog() == DialogResult.OK)
            {
                pdf.SaveAs(saveDialog.FileName);
                MessageBox.Show($"PDF saved to {saveDialog.FileName}");
            }
        }
    }
}

public partial class PdfGeneratorForm : Form
{
    private void btnGeneratePdf_Click(object sender, EventArgs e)
    {
        var renderer = new ChromePdfRenderer();
        var pdf = renderer.RenderHtmlAsPdf(txtHtml.Text);

        using (var saveDialog = new SaveFileDialog())
        {
            saveDialog.Filter = "PDF files|*.pdf";
            if (saveDialog.ShowDialog() == DialogResult.OK)
            {
                pdf.SaveAs(saveDialog.FileName);
                MessageBox.Show($"PDF saved to {saveDialog.FileName}");
            }
        }
    }
}

Partial Public Class PdfGeneratorForm
	Inherits Form

	Private Sub btnGeneratePdf_Click(ByVal sender As Object, ByVal e As EventArgs)
		Dim renderer = New ChromePdfRenderer()
		Dim pdf = renderer.RenderHtmlAsPdf(txtHtml.Text)

		Using saveDialog = New SaveFileDialog()
			saveDialog.Filter = "PDF files|*.pdf"
			If saveDialog.ShowDialog() = System.Windows.Forms.DialogResult.OK Then
				pdf.SaveAs(saveDialog.FileName)
				MessageBox.Show($"PDF saved to {saveDialog.FileName}")
			End If
		End Using
	End Sub
End Class

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MAUI (Multi-platform App UI)

public partial class MainPage : ContentPage
{
    public async Task GeneratePdfAsync()
    {
        var renderer = new ChromePdfRenderer();
        var pdf = await renderer.RenderHtmlAsPdfAsync(HtmlContent);

        // Save to app's document directory
        var documentsPath = FileSystem.Current.AppDataDirectory;
        var filePath = Path.Combine(documentsPath, "output.pdf");

        await File.WriteAllBytesAsync(filePath, pdf.BinaryData);

        await DisplayAlert("Success", $"PDF saved to {filePath}", "OK");
    }
}

public partial class MainPage : ContentPage
{
    public async Task GeneratePdfAsync()
    {
        var renderer = new ChromePdfRenderer();
        var pdf = await renderer.RenderHtmlAsPdfAsync(HtmlContent);

        // Save to app's document directory
        var documentsPath = FileSystem.Current.AppDataDirectory;
        var filePath = Path.Combine(documentsPath, "output.pdf");

        await File.WriteAllBytesAsync(filePath, pdf.BinaryData);

        await DisplayAlert("Success", $"PDF saved to {filePath}", "OK");
    }
}

Partial Public Class MainPage
	Inherits ContentPage

	Public Async Function GeneratePdfAsync() As Task
		Dim renderer = New ChromePdfRenderer()
		Dim pdf = Await renderer.RenderHtmlAsPdfAsync(HtmlContent)

		' Save to app's document directory
		Dim documentsPath = FileSystem.Current.AppDataDirectory
		Dim filePath = Path.Combine(documentsPath, "output.pdf")

		Await File.WriteAllBytesAsync(filePath, pdf.BinaryData)

		Await DisplayAlert("Success", $"PDF saved to {filePath}", "OK")
	End Function
End Class

$vbLabelText $csharpLabel

Getting Started with PDF Creation

Ready to start creating PDFs in your C# application? Follow this step-by-step guide to go from installation to your first generated PDF. IronPDF makes it easy to get started, with comprehensive resources and support available every step of the way.

Step 1: Install IronPDF

Choose the installation method that works best for your development environment:

Visual Studio Package Manager** (Recommended)

Open your project in Visual Studio
Right-click on your project in Solution Explorer
Select "Manage NuGet Packages"
Search for "IronPDF"
Click Install on the IronPdf package by Iron Software

Package Manager Console**

Install-Package IronPdf

.NET CLI

dotnet add package IronPdf

The NuGet package includes everything needed for PDF generation on Windows, Linux, and macOS. For specialized deployments, consider these platform-specific packages that optimize size and performance:

IronPdf.Linux - Optimized for Linux environments
IronPdf.MacOs - Native Apple Silicon support
IronPdf.Slim - Minimal package that downloads dependencies at runtime

Step 2: Create Your First PDF

Start with a simple example to verify everything is working:

using IronPdf;

class Program
{
    static void Main()
    {
        // Create a new PDF generator instance
        var renderer = new ChromePdfRenderer();

        // Generate PDF from HTML
        var pdf = renderer.RenderHtmlAsPdf(@"
            <h1>Welcome to IronPDF!</h1>
            <p>This is your first generated PDF document.</p>
            <p>Created on: " + DateTime.Now + "</p>"
        );

        // Save the PDF
        pdf.SaveAs("my-first-pdf.pdf");

        Console.WriteLine("PDF created successfully!");
    }
}

using IronPdf;

class Program
{
    static void Main()
    {
        // Create a new PDF generator instance
        var renderer = new ChromePdfRenderer();

        // Generate PDF from HTML
        var pdf = renderer.RenderHtmlAsPdf(@"
            <h1>Welcome to IronPDF!</h1>
            <p>This is your first generated PDF document.</p>
            <p>Created on: " + DateTime.Now + "</p>"
        );

        // Save the PDF
        pdf.SaveAs("my-first-pdf.pdf");

        Console.WriteLine("PDF created successfully!");
    }
}

Imports IronPdf

Friend Class Program
	Shared Sub Main()
		' Create a new PDF generator instance
		Dim renderer = New ChromePdfRenderer()

		' Generate PDF from HTML
		Dim pdf = renderer.RenderHtmlAsPdf("
            <h1>Welcome to IronPDF!</h1>
            <p>This is your first generated PDF document.</p>
            <p>Created on: " & DateTime.Now & "</p>")

		' Save the PDF
		pdf.SaveAs("my-first-pdf.pdf")

		Console.WriteLine("PDF created successfully!")
	End Sub
End Class

$vbLabelText $csharpLabel

Step 3: Explore Examples and Tutorials

IronPDF provides extensive resources to help you master PDF generation:

Code Examples - Ready-to-use code snippets for common scenarios
Tutorials - Step-by-step guides for specific features
How-To Guides - Practical solutions to real-world problems
API Reference - Comprehensive documentation of all classes and methods

Step 4: Get Help When Needed

IronPDF offers multiple support channels to ensure your success:

24/7 Live Chat Support - Chat with engineers in real-time for immediate assistance
Email Support - Get detailed responses to complex questions
Stack Overflow - Community support and solutions

Step 5: Development and Deployment

Free Development License

IronPDF is free for development and testing. You can explore all features without any limitations during development. Watermarks appear on generated PDFs in development mode but don't affect functionality.

Production Deployment Options

When you're ready to deploy to production, IronPDF offers flexible licensing:

Free Trial - Get a 30-day trial license to test in production without watermarks
Commercial Licenses - Starting at $749 for single-project deployment
Enterprise Solutions - Custom packages for large organizations

To apply a license in your code:

IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY";

IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY";

IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY"

$vbLabelText $csharpLabel

Step 6: Stay Updated

Keep your PDF generation capabilities current:

Subscribe to Updates - Get notified about new features and improvements
Follow the Blog - Learn about best practices and new techniques
Check the Changelog - See what's new in each release

Regular updates ensure compatibility with the latest .NET versions and include performance improvements, new features, and security updates.

Why Choose IronPDF for PDF Generation in C#?

After exploring various approaches to create PDFs in C#, you might wonder what makes IronPDF the preferred choice for many developers. It's not just about features - it's about the entire developer experience, from initial implementation to long-term maintenance when you need to generate PDFs in .NET. With over 14 million developers using IronPDF globally as their C# PDF generator, it has become the de facto standard for PDF generation in .NET applications. Let's examine why developers choose IronPDF for their PDF creation in C# needs.

Pixel-Perfect Rendering

Unlike other PDF libraries that produce approximations of your HTML designs, IronPDF uses a real Chromium engine to ensure your PDFs look exactly like they would in a modern web browser. This pixel-perfect rendering capability is why financial institutions trust IronPDF to generate regulatory reports where precision matters. Your CSS Grid layouts, flexbox designs, and JavaScript-rendered content all work perfectly. No more fighting with proprietary layout engines or accepting "close enough" results when you create PDF documents.

Developer-Friendly API

IronPDF's API is designed by developers, for developers. The simplicity of the API is why startups can get their PDF generation working in hours, not days. Instead of learning complex PDF specifications, you work with familiar concepts:

using IronPdf;

// Other libraries might require this:
// document.Add(new Paragraph("Hello World"));
// document.Add(new Table(3, 2));
// cell.SetBackgroundColor(ColorConstants.LIGHT_GRAY);

// With IronPDF, just use HTML:
var renderer = new ChromePdfRenderer();
var pdf = renderer.RenderHtmlAsPdf(@"
    <h1>Hello World</h1>
    <table>
        <tr style='background: lightgray;'>
            <td>Simple</td>
            <td>Intuitive</td>
        </tr>
    </table>
");

using IronPdf;

// Other libraries might require this:
// document.Add(new Paragraph("Hello World"));
// document.Add(new Table(3, 2));
// cell.SetBackgroundColor(ColorConstants.LIGHT_GRAY);

// With IronPDF, just use HTML:
var renderer = new ChromePdfRenderer();
var pdf = renderer.RenderHtmlAsPdf(@"
    <h1>Hello World</h1>
    <table>
        <tr style='background: lightgray;'>
            <td>Simple</td>
            <td>Intuitive</td>
        </tr>
    </table>
");

Imports IronPdf

' Other libraries might require this:
' document.Add(new Paragraph("Hello World"));
' document.Add(new Table(3, 2));
' cell.SetBackgroundColor(ColorConstants.LIGHT_GRAY);

' With IronPDF, just use HTML:
Private renderer = New ChromePdfRenderer()
Private pdf = renderer.RenderHtmlAsPdf("
    <h1>Hello World</h1>
    <table>
        <tr style='background: lightgray;'>
            <td>Simple</td>
            <td>Intuitive</td>
        </tr>
    </table>
")

$vbLabelText $csharpLabel

Enterprise-Ready Features

IronPDF includes features that enterprise applications demand, which is why Fortune 500 companies rely on it for mission-critical document generation:

Security: Encryption, digital signatures, and permission controls protect sensitive documents
Compliance: PDF/A and PDF/UA support ensures your generated PDFs meet regulatory requirements
Performance: Async operations and batch processing handle millions of documents efficiently
Reliability: Extensive error handling and logging help maintain uptime in production

Outstanding Support

When you need help, IronPDF's support team consists of actual engineers who understand your challenges. With 24/7 live chat support and typical response times under 30 seconds, you're never stuck waiting for answers. This level of support is why developers consistently rate IronPDF as having the best support in the industry. The support team can help with everything from basic questions to complex implementation challenges, ensuring your PDF generation projects succeed.

Transparent Pricing

No hidden fees, no surprise costs, no per-server licensing complications. IronPDF's straightforward licensing model means you know exactly what you're paying for. Development is always free, and production licenses are perpetual - you own them forever. This transparency is refreshing in an industry known for complex licensing schemes.

Active Development

IronPDF is continuously improved with monthly updates that add features, enhance performance, and ensure compatibility with the latest .NET releases. The team actively monitors customer feedback and implements requested features regularly. Recent additions include enhanced form handling, improved PDF editing capabilities, and optimizations for cloud deployments.

Real-World Success Stories

Thousands of companies across industries trust IronPDF for mission-critical PDF generation:

Finance: Banks generate millions of statements and reports monthly using IronPDF's secure document features
Healthcare: Hospitals create patient records and lab results with HIPAA-compliant security settings
E-commerce: Online retailers produce invoices and shipping labels at scale, handling peak loads effortlessly
Government: Agencies generate official documents and forms with digital signatures and encryption

These organizations choose IronPDF because it delivers consistent results at scale - whether generating a single invoice or processing millions of documents daily.

How Does IronPDF Compare to Other C# PDF Libraries?

Choosing the right PDF library is crucial for your project's success when you need to generate PDFs in C#. Let's look at how IronPDF compares to other popular options in the .NET ecosystem for PDF creation. This comparison is based on real-world usage, developer feedback, and technical capabilities for those looking to build PDFs in .NET. Understanding these differences helps you choose the best C# PDF generator for your specific needs.

Comparison Table

Feature	IronPDF	wkhtmltopdf	QuestPDF	iText 7	PdfSharp	Syncfusion	Aspose.PDF
HTML to PDF Quality	Pixel-Perfect	Print-Style	N/A	Limited	No HTML	Good	Good
HTML5/CSS3 Support	Full	Outdated	Code-Only	Partial	None	Full	Full
JavaScript Support	Full	No	No	Limited	No	Limited	Limited
Ease of Use	3 Lines	CLI Only	Code-First	Complex	Low-Level	Good	Complex
Server Dependencies	None	Executable	None	None	None	None	None
Performance	Fast + Async	Slow	Fast	Fast	Fast	Fast	Fast
Active Development	Very Active	Abandoned	Active	Active	Minimal	Active	Active
License Type	Commercial	Open Source	MIT→Commercial*	AGPL/Commercial	MIT	Commercial	Commercial
Starting Price	$749	Free	$599+*	$1,999+	Free	$2,995+	$2,499+

*Note: QuestPDF recently changed from MIT to commercial licensing

Detailed Comparisons

IronPDF vs wkhtmltopdf

wkhtmltopdf is free but was abandoned in 2020 and produces dated-looking PDFs
Requires platform-specific executables that complicate deployment
No JavaScript support means modern web apps won't render correctly
IronPDF offers modern rendering with no external dependencies

IronPDF vs QuestPDF

QuestPDF requires building PDFs entirely in C# code with no HTML support
Good for programmatic PDF creation but time-consuming for complex layouts
Recently switched from MIT to commercial licensing
IronPDF lets you use HTML/CSS skills you already have

IronPDF vs iText 7

iText has AGPL licensing that can "infect" your codebase
Commercial licenses start at $1,999 with complex pricing
Limited HTML to PDF capabilities with poor CSS support
IronPDF provides superior HTML rendering at a lower price point

IronPDF vs PdfSharp

PdfSharp is great for low-level PDF manipulation but has zero HTML support
Requires manually positioning every element on the page
Free and open source but very limited in features
IronPDF handles both high-level HTML and low-level PDF operations

IronPDF vs Syncfusion/Aspose.PDF

Both are enterprise options with good features but higher pricing
Syncfusion starts at $2,995, Aspose at $2,499
Neither achieves the same pixel-perfect HTML rendering as IronPDF
IronPDF offers better value with comparable enterprise features

Migration Paths

Many developers switch to IronPDF from other libraries. Here's why:

From wkhtmltopdf

"We were tired of dealing with platform-specific binaries and outdated rendering"
"IronPDF gave us modern CSS support and eliminated our Docker headaches"

From iTextSharp/iText 7

"The learning curve was killing our productivity - IronPDF let us use HTML instead"
"AGPL licensing was a deal-breaker for our commercial product"

From PdfSharp

"We needed HTML to PDF conversion, which PdfSharp simply doesn't do"
"Manually positioning every element was taking forever"

From QuestPDF

"Building layouts in C# code was tedious compared to using HTML/CSS"
"The recent license change made us reconsider our options"

Conclusion

Creating PDFs in C# doesn't have to be complicated. With IronPDF, you can generate professional PDF documents using the HTML and CSS skills you already have. Whether you're building simple reports or complex documents with charts and forms, IronPDF handles the heavy lifting so you can focus on your application logic. Join the 14 million developers worldwide who trust IronPDF as their C# PDF generator to produce PDFs reliably and efficiently.

Throughout this guide, we've explored how to create PDF documents using multiple approaches - from HTML strings and URLs to converting existing files like Word documents and Markdown. We've seen how IronPDF's modern Chromium-based rendering engine produces pixel-perfect results that actually look like your web designs, not dated printer output. The ability to manipulate PDF documents programmatically, add security features, and optimize performance makes IronPDF a complete solution for all your PDF generation tasks in .NET.

What sets IronPDF apart is its developer-first approach. With just three lines of code, you can generate your first PDF. The intuitive API means you spend less time learning proprietary PDF syntax and more time building features. Combined with excellent support from real engineers, transparent pricing, and continuous updates (including pre-release support for .NET 10), IronPDF gives you confidence that your PDF creation in C# will work today and in the future.

Start creating PDFs today - get your free trial license and see how easy PDF generation in .NET can be in your applications. With IronPDF, you'll be generating professional PDFs in minutes, not hours.

Ready to build your first PDF? Get started with IronPDF - it's free for development, and you'll be creating PDFs with C# in minutes.

Please note

Aspose, iText, wkhtmltopdf, QuestPDF, PdfSharp and SyncFusion are registered trademarks of their respective owners. This site is not affiliated with, endorsed by, or sponsored by Aspose, iText, wkhtmltopdf, QuestPDF, PdfSharp, or SyncFusion. All product names, logos, and brands are the property of their respective owners. Comparisons are provided for informational purposes only and are based on publicly available information at the time of writing.

Frequently Asked Questions

What is the easiest way to create a PDF from HTML in .NET?

Many developers find using a product like IronPDF one of the easiest ways due to its simple RenderHtmlAsPdf method and strong support for HTML standards. You can create PDF files from HTML strings or URLs with just a few lines of code.

Is there a free PDF library available for testing and development?

Products like IronPDF offer a free license for development and testing. A commercial license is required for production deployment. They provide a trial period to evaluate all features.

Can complex web pages with JavaScript and CSS3 be converted to PDF?

Yes, using tools like IronPDF, which use a modern Chromium engine, you can achieve excellent support for HTML5, CSS3, JavaScript, responsive layouts, and other web technologies for accurate rendering when you create PDF files.

Can large PDF generation be handled efficiently in .NET?

Yes, libraries like IronPDF are designed for performance and can efficiently create PDF documents of considerable size. Their rendering engines and options for asynchronous operations make them suitable for demanding applications.

What are the key features of a robust PDF library?

A robust PDF library like IronPDF offers pixel-perfect HTML to PDF rendering, ease of use, quick setup, comprehensive features for PDF manipulation, excellent support, and regular updates. It supports modern web standards and is optimized for performance.

How can complex PDF generation scenarios be supported?

Tools like IronPDF support complex scenarios by allowing the use of HTML templates, JavaScript, CSS, and offering features like password protection, digital signatures, and form filling.

What is the advantage of using a Chrome PDF Rendering Engine?

The Chrome PDF Rendering Engine, as used in products like IronPDF, ensures 'Chrome Identical' PDF rendering from HTML, providing fast, accurate, and browser-like rendering for PDF documents.

What are the common use cases for generating PDFs in C# applications?

Common use cases include generating invoices, creating dynamic reports, archiving web content, secure document sharing, and creating tickets or certificates, which can be efficiently handled using a library like IronPDF.

How can a PDF generation library be integrated into a Windows Forms application?

A library like IronPDF can be integrated into a Windows Forms application by allowing user input from a TextBox and generating a PDF when a Button is clicked, using the ChromePdfRenderer.

How does licensing work for development and production in PDF libraries?

Libraries like IronPDF offer a free license for development and testing. A commercial license is needed for production environments, with a trial period available for evaluation.

Jacob Mellor

Chat with engineering team now

Chief Technology Officer

Jacob Mellor is Chief Technology Officer at Iron Software and a visionary engineer pioneering C# PDF technology. As the original developer behind Iron Software's core codebase, he has shaped the company's product architecture since its inception, transforming it alongside CEO Cameron Rimington into a 50+ person company serving NASA, Tesla, and global government agencies.

Jacob holds a First-Class Honours Bachelor of Engineering (BEng) in Civil Engineering from the University of Manchester (1998–2001). After opening his first software business in London in 1999 and creating his first .NET components in 2005, he specialized in solving complex problems across the Microsoft ecosystem.

His flagship IronPDF & IronSuite .NET libraries have achieved over 30 million NuGet installations globally, with his foundational code continuing to power developer tools used worldwide. With 25 years of commercial experience and 41 years of coding expertise, Jacob remains focused on driving innovation in enterprise-grade C#, Java, and Python PDF technologies while mentoring the next generation of technical leaders.

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.NET Core PDF Library

x509certificate2 Add Digital Signature to PDF Programmatically

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C# Create PDF (Code Example Tutorial)

Quick Start: Create Your First PDF in C# (Under 2 Minutes)

How to Create a PDF in C#: A Quick Overview

Why Would Developers Need to Create PDFs in C#?

Setting Up IronPDF in Your C# Project

Installation Methods

Method 1: Visual Studio Package Manager (Recommended for Beginners)

Method 2: Package Manager Console

Method 3: .NET CLI (For Cross-Platform Development)

Choosing the Right Package

Please note

Verifying Your Installation

What Are the Different Ways to Generate PDFs in C#?

1. Create PDF from HTML String (Most Flexible)

2. Generate PDF from URL (Web Page Capture)

3. Create PDF from HTML File (Template-Based Generation)

4. Convert Markdown to PDF

5. Convert Word Documents (DOCX) to PDF

6. Convert Images to PDF

7. Generate PDF from ASP.NET Pages

How Can I Make My PDFs Look Professional?

Headers, Footers, and Page Numbers

Advanced Page Setup and Layout Control

Working with Fonts and Typography

Real-World Example: How Do I Generate an Invoice PDF?

What Advanced PDF Features Does IronPDF Offer?

Generate Interactive PDF Forms

Secure Your Generated PDFs

Merge and Split PDFs

Add Watermarks and Stamps

How Can I Optimize Performance When Generating PDFs at Scale?

Async PDF Generation

Batch Processing Best Practices

Memory Optimization Techniques

Caching and Template Optimization

What Are Common Issues When Creating PDFs and How Do I Fix Them?

Issue 1: Failed Rendering or Blank PDFs

Issue 2: Slow Initial Render

Issue 3: Deployment Issues on Linux/Docker

Issue 4: Memory and Performance Issues

Issue 5: Font and Encoding Issues

Getting Help

Which Platforms Support IronPDF for PDF Generation?

.NET Version Compatibility

Operating System Support

Windows

Linux

macOS

Cloud Platform Deployment

Microsoft Azure

Amazon Web Services (AWS)

Google Cloud Platform

Container Deployment (Docker/Kubernetes)

Desktop Application Support

WPF (Windows Presentation Foundation)

Windows Forms

MAUI (Multi-platform App UI)

Getting Started with PDF Creation

Step 1: Install IronPDF

Visual Studio Package Manager** (Recommended)

Package Manager Console**

.NET CLI

Step 2: Create Your First PDF

Step 3: Explore Examples and Tutorials

Step 4: Get Help When Needed

Step 5: Development and Deployment

Free Development License

Production Deployment Options

Step 6: Stay Updated

Why Choose IronPDF for PDF Generation in C#?

Pixel-Perfect Rendering

Developer-Friendly API

Enterprise-Ready Features

Outstanding Support

Transparent Pricing

Active Development

Real-World Success Stories

How Does IronPDF Compare to Other C# PDF Libraries?

Comparison Table