MIGRATION GUIDES

How to Migrate from GemBox PDF to IronPDF in C#

Published:January 25, 2026

Migrating from GemBox PDF to IronPDF transforms your .NET PDF workflow from coordinate-based, programmatic document construction to modern HTML/CSS-based rendering. This guide provides a comprehensive, step-by-step migration path that eliminates paragraph limits and simplifies document creation for professional .NET developers.

Why Migrate from GemBox PDF to IronPDF

The GemBox PDF Challenges

GemBox PDF is a capable .NET PDF component, but it has significant limitations that affect real-world development:

20 Paragraph Limit in Free Version: The free version restricts you to 20 paragraphs, and table cells count toward this limit. A simple 10-row, 5-column table uses 50 "paragraphs," making the free version unusable for even basic business documents.
No HTML-to-PDF Conversion: GemBox PDF requires programmatic document construction. You must calculate coordinates and manually position every element—there's no simple "render this HTML" capability.
Coordinate-Based Layout: Unlike HTML/CSS where layout flows naturally, GemBox PDF requires you to calculate exact X/Y positions for every text element, image, and shape.
Limited Feature Set: Compared to comprehensive PDF libraries, GemBox PDF focuses on basic operations—reading, writing, merging, splitting—without advanced features like HTML rendering or modern CSS support.
Programmatic Only: Every design change requires code changes. Want to tweak spacing? Recalculate coordinates. Want a different font size? Adjust all Y positions below it.
Table Cell Counting: The paragraph limit counts table cells, not just visible paragraphs. This makes the free version practically worthless for documents with tables.
Learning Curve for Design: Developers must think in coordinates rather than document flow, making simple tasks like "add a paragraph" surprisingly complex.

GemBox PDF vs IronPDF Comparison

Aspect	GemBox PDF	IronPDF
Free Version Limits	20 paragraphs (includes table cells)	Watermark only, no content limits
HTML-to-PDF	Not supported	Full Chromium engine
Layout Approach	Coordinate-based, manual	HTML/CSS flow layout
Tables	Count toward paragraph limit	Unlimited, use HTML tables
Modern CSS	Not applicable	Flexbox, Grid, CSS3 animations
JavaScript Support	Not applicable	Full JavaScript execution
Design Changes	Recalculate coordinates	Edit HTML/CSS
Learning Curve	PDF coordinate system	HTML/CSS (web familiar)

For teams planning .NET 10 and C# 14 adoption through 2025 and 2026, IronPDF provides a future-proof foundation that leverages familiar web technologies for PDF generation.

Migration Complexity Assessment

Estimated Effort by Feature

Feature	Migration Complexity	Notes
Load/Save PDFs	Very Low	Direct method mapping
Merge PDFs	Very Low	Direct method mapping
Split PDFs	Low	Page index handling
Text Extraction	Very Low	Direct method mapping
Add Text	Medium	Coordinate → HTML
Tables	Low	Manual → HTML tables
Images	Low	Coordinate → HTML
Watermarks	Low	Different API
Password Protection	Medium	Different structure
Form Fields	Medium	API differences

Paradigm Shift

The biggest change in this GemBox PDF migration is moving from coordinate-based layout to HTML/CSS layout:

GemBox PDF:  "Draw text at position (100, 700)"
IronPDF:     "Render this HTML with CSS styling"

This paradigm shift is generally easier for developers familiar with web technologies, but requires thinking about PDFs differently.

Before You Start

Prerequisites

.NET Version: IronPDF supports .NET Framework 4.6.2+ and .NET Core 2.0+ / .NET 5/6/7/8/9+
License Key: Obtain your IronPDF license key from ironpdf.com
Backup: Create a branch for migration work
HTML/CSS Knowledge: Basic familiarity helpful but not required

Identify All GemBox PDF Usage

# Find all GemBox PDF references
grep -r "GemBox\.Pdf\|PdfDocument\|PdfPage\|PdfFormattedText\|ComponentInfo\.SetLicense" --include="*.cs" .

# Find package references
grep -r "GemBox\.Pdf" --include="*.csproj" .

# Find all GemBox PDF references
grep -r "GemBox\.Pdf\|PdfDocument\|PdfPage\|PdfFormattedText\|ComponentInfo\.SetLicense" --include="*.cs" .

# Find package references
grep -r "GemBox\.Pdf" --include="*.csproj" .

SHELL

NuGet Package Changes

# Remove GemBox PDF
dotnet remove package GemBox.Pdf

# Install IronPDF
dotnet add package IronPdf

# Remove GemBox PDF
dotnet remove package GemBox.Pdf

# Install IronPDF
dotnet add package IronPdf

SHELL

Quick Start Migration

Step 1: Update License Configuration

Before (GemBox PDF):

// Must call before any GemBox PDF operations
ComponentInfo.SetLicense("FREE-LIMITED-KEY");
// Or for professional:
ComponentInfo.SetLicense("YOUR-PROFESSIONAL-LICENSE");

// Must call before any GemBox PDF operations
ComponentInfo.SetLicense("FREE-LIMITED-KEY");
// Or for professional:
ComponentInfo.SetLicense("YOUR-PROFESSIONAL-LICENSE");

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After (IronPDF):

// Set once at application startup
IronPdf.License.LicenseKey = "YOUR-IRONPDF-LICENSE-KEY";

// Or in appsettings.json:
// { "IronPdf.License.LicenseKey": "YOUR-LICENSE-KEY" }

// Set once at application startup
IronPdf.License.LicenseKey = "YOUR-IRONPDF-LICENSE-KEY";

// Or in appsettings.json:
// { "IronPdf.License.LicenseKey": "YOUR-LICENSE-KEY" }

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Step 2: Update Namespace Imports

// Before (GemBox PDF)
using GemBox.Pdf;
using GemBox.Pdf.Content;

// After (IronPDF)
using IronPdf;
using IronPdf.Editing;

// Before (GemBox PDF)
using GemBox.Pdf;
using GemBox.Pdf.Content;

// After (IronPDF)
using IronPdf;
using IronPdf.Editing;

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Step 3: Basic Conversion Pattern

Before (GemBox PDF):

using GemBox.Pdf;
using GemBox.Pdf.Content;

ComponentInfo.SetLicense("FREE-LIMITED-KEY");

using (var document = new PdfDocument())
{
    var page = document.Pages.Add();
    var formattedText = new PdfFormattedText()
    {
        Text = "Hello World",
        FontSize = 24
    };

    page.Content.DrawText(formattedText, new PdfPoint(100, 700));
    document.Save("output.pdf");
}

using GemBox.Pdf;
using GemBox.Pdf.Content;

ComponentInfo.SetLicense("FREE-LIMITED-KEY");

using (var document = new PdfDocument())
{
    var page = document.Pages.Add();
    var formattedText = new PdfFormattedText()
    {
        Text = "Hello World",
        FontSize = 24
    };

    page.Content.DrawText(formattedText, new PdfPoint(100, 700));
    document.Save("output.pdf");
}

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After (IronPDF):

using IronPdf;

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

var renderer = new ChromePdfRenderer();
var pdf = renderer.RenderHtmlAsPdf("<h1 style='font-size:24px;'>Hello World</h1>");
pdf.SaveAs("output.pdf");

using IronPdf;

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

var renderer = new ChromePdfRenderer();
var pdf = renderer.RenderHtmlAsPdf("<h1 style='font-size:24px;'>Hello World</h1>");
pdf.SaveAs("output.pdf");

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Key Differences:

No coordinate calculations needed
HTML/CSS instead of programmatic layout
No paragraph limits
Simpler, more readable code

Complete API Reference

Namespace Mapping

GemBox PDF	IronPDF
`GemBox.Pdf`	`IronPdf`
`GemBox.Pdf.Content`	`IronPdf` (content is HTML)
`GemBox.Pdf.Security`	`IronPdf` (SecuritySettings)
`GemBox.Pdf.Forms`	`IronPdf.Forms`

Core Class Mapping

GemBox PDF	IronPDF	Description
`PdfDocument`	`PdfDocument`	Main PDF document class
`PdfPage`	`PdfDocument.Pages[i]`	Page representation
`PdfContent`	N/A (use HTML)	Page content
`PdfFormattedText`	N/A (use HTML)	Formatted text
`PdfPoint`	N/A (use CSS positioning)	Coordinate positioning
`ComponentInfo.SetLicense()`	`IronPdf.License.LicenseKey`	License management

Document Operations

GemBox PDF	IronPDF	Notes
`new PdfDocument()`	`new PdfDocument()`	Create new document
`PdfDocument.Load(path)`	`PdfDocument.FromFile(path)`	Load from file
`PdfDocument.Load(stream)`	`PdfDocument.FromStream(stream)`	Load from stream
`document.Save(path)`	`pdf.SaveAs(path)`	Save to file
`document.Save(stream)`	`pdf.Stream` or `pdf.BinaryData`	Get as stream/bytes

Page Operations

GemBox PDF	IronPDF	Notes
`document.Pages.Add()`	Create via HTML rendering	Add new page
`document.Pages.Count`	`pdf.PageCount`	Page count
`document.Pages[index]`	`pdf.Pages[index]`	Access page (both 0-indexed)
`document.Pages.AddClone(pages)`	`PdfDocument.Merge()`	Clone/merge pages

Text and Content Operations

GemBox PDF	IronPDF	Notes
`new PdfFormattedText()`	HTML string	Text content
`formattedText.FontSize = 12`	CSS `font-size: 12pt`	Font size
`formattedText.Font = ...`	CSS `font-family: ...`	Font family
`page.Content.DrawText(text, point)`	`renderer.RenderHtmlAsPdf(html)`	Render text
`page.Content.GetText()`	`pdf.ExtractTextFromPage(i)`	Extract text

Code Migration Examples

Example 1: HTML to PDF Conversion

Before (GemBox PDF):

// NuGet: Install-Package GemBox.Pdf
using GemBox.Pdf;
using GemBox.Pdf.Content;

class Program
{
    static void Main()
    {
        ComponentInfo.SetLicense("FREE-LIMITED-KEY");

        var document = PdfDocument.Load("input.html");
        document.Save("output.pdf");
    }
}

// NuGet: Install-Package GemBox.Pdf
using GemBox.Pdf;
using GemBox.Pdf.Content;

class Program
{
    static void Main()
    {
        ComponentInfo.SetLicense("FREE-LIMITED-KEY");

        var document = PdfDocument.Load("input.html");
        document.Save("output.pdf");
    }
}

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After (IronPDF):

// NuGet: Install-Package IronPdf
using IronPdf;

class Program
{
    static void Main()
    {
        var renderer = new ChromePdfRenderer();
        var pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1>");
        pdf.SaveAs("output.pdf");
    }
}

// NuGet: Install-Package IronPdf
using IronPdf;

class Program
{
    static void Main()
    {
        var renderer = new ChromePdfRenderer();
        var pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1>");
        pdf.SaveAs("output.pdf");
    }
}

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IronPDF's ChromePdfRenderer uses a modern Chromium engine for accurate HTML/CSS/JavaScript rendering. Unlike GemBox PDF's limited HTML support, IronPDF can render any HTML content with full CSS3 and JavaScript support. See the HTML to PDF documentation for more rendering options.

Example 2: Merge PDF Files

Before (GemBox PDF):

// NuGet: Install-Package GemBox.Pdf
using GemBox.Pdf;
using System.Linq;

class Program
{
    static void Main()
    {
        ComponentInfo.SetLicense("FREE-LIMITED-KEY");

        using (var document = new PdfDocument())
        {
            var source1 = PdfDocument.Load("document1.pdf");
            var source2 = PdfDocument.Load("document2.pdf");

            document.Pages.AddClone(source1.Pages);
            document.Pages.AddClone(source2.Pages);

            document.Save("merged.pdf");
        }
    }
}

// NuGet: Install-Package GemBox.Pdf
using GemBox.Pdf;
using System.Linq;

class Program
{
    static void Main()
    {
        ComponentInfo.SetLicense("FREE-LIMITED-KEY");

        using (var document = new PdfDocument())
        {
            var source1 = PdfDocument.Load("document1.pdf");
            var source2 = PdfDocument.Load("document2.pdf");

            document.Pages.AddClone(source1.Pages);
            document.Pages.AddClone(source2.Pages);

            document.Save("merged.pdf");
        }
    }
}

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After (IronPDF):

// NuGet: Install-Package IronPdf
using IronPdf;

class Program
{
    static void Main()
    {
        var pdf1 = PdfDocument.FromFile("document1.pdf");
        var pdf2 = PdfDocument.FromFile("document2.pdf");

        var merged = PdfDocument.Merge(pdf1, pdf2);
        merged.SaveAs("merged.pdf");
    }
}

// NuGet: Install-Package IronPdf
using IronPdf;

class Program
{
    static void Main()
    {
        var pdf1 = PdfDocument.FromFile("document1.pdf");
        var pdf2 = PdfDocument.FromFile("document2.pdf");

        var merged = PdfDocument.Merge(pdf1, pdf2);
        merged.SaveAs("merged.pdf");
    }
}

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IronPDF's static Merge method simplifies the operation—no need to create an empty document and clone pages individually. Learn more about merging and splitting PDFs.

Example 3: Add Text to PDF

Before (GemBox PDF):

// NuGet: Install-Package GemBox.Pdf
using GemBox.Pdf;
using GemBox.Pdf.Content;

class Program
{
    static void Main()
    {
        ComponentInfo.SetLicense("FREE-LIMITED-KEY");

        using (var document = new PdfDocument())
        {
            var page = document.Pages.Add();
            var formattedText = new PdfFormattedText()
            {
                Text = "Hello World",
                FontSize = 24
            };

            page.Content.DrawText(formattedText, new PdfPoint(100, 700));
            document.Save("output.pdf");
        }
    }
}

// NuGet: Install-Package GemBox.Pdf
using GemBox.Pdf;
using GemBox.Pdf.Content;

class Program
{
    static void Main()
    {
        ComponentInfo.SetLicense("FREE-LIMITED-KEY");

        using (var document = new PdfDocument())
        {
            var page = document.Pages.Add();
            var formattedText = new PdfFormattedText()
            {
                Text = "Hello World",
                FontSize = 24
            };

            page.Content.DrawText(formattedText, new PdfPoint(100, 700));
            document.Save("output.pdf");
        }
    }
}

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After (IronPDF):

// NuGet: Install-Package IronPdf
using IronPdf;
using IronPdf.Editing;

class Program
{
    static void Main()
    {
        var renderer = new ChromePdfRenderer();
        var pdf = renderer.RenderHtmlAsPdf("<p>Original Content</p>");

        var stamper = new TextStamper()
        {
            Text = "Hello World",
            FontSize = 24,
            HorizontalOffset = 100,
            VerticalOffset = 700
        };

        pdf.ApplyStamp(stamper);
        pdf.SaveAs("output.pdf");
    }
}

// NuGet: Install-Package IronPdf
using IronPdf;
using IronPdf.Editing;

class Program
{
    static void Main()
    {
        var renderer = new ChromePdfRenderer();
        var pdf = renderer.RenderHtmlAsPdf("<p>Original Content</p>");

        var stamper = new TextStamper()
        {
            Text = "Hello World",
            FontSize = 24,
            HorizontalOffset = 100,
            VerticalOffset = 700
        };

        pdf.ApplyStamp(stamper);
        pdf.SaveAs("output.pdf");
    }
}

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For adding text to existing PDFs, IronPDF provides the TextStamper class which offers precise positioning control. For new documents, simply include the text in your HTML template. See the stamping documentation for additional options.

Example 4: Creating Tables (The Biggest Improvement!)

Before (GemBox PDF) - Each cell counts toward 20-paragraph limit:

using GemBox.Pdf;
using GemBox.Pdf.Content;

ComponentInfo.SetLicense("FREE-LIMITED-KEY");

using (var document = new PdfDocument())
{
    var page = document.Pages.Add();
    double y = 700;
    double[] xPositions = { 50, 200, 300, 400 };

    // Headers (4 paragraphs)
    var headers = new[] { "Product", "Price", "Qty", "Total" };
    for (int i = 0; i < headers.Length; i++)
    {
        var text = new PdfFormattedText { Text = headers[i], FontSize = 12 };
        page.Content.DrawText(text, new PdfPoint(xPositions[i], y));
    }
    y -= 20;

    // Data rows (4 paragraphs per row!)
    // Can only add a few rows before hitting 20-paragraph limit!

    document.Save("products.pdf");
}

using GemBox.Pdf;
using GemBox.Pdf.Content;

ComponentInfo.SetLicense("FREE-LIMITED-KEY");

using (var document = new PdfDocument())
{
    var page = document.Pages.Add();
    double y = 700;
    double[] xPositions = { 50, 200, 300, 400 };

    // Headers (4 paragraphs)
    var headers = new[] { "Product", "Price", "Qty", "Total" };
    for (int i = 0; i < headers.Length; i++)
    {
        var text = new PdfFormattedText { Text = headers[i], FontSize = 12 };
        page.Content.DrawText(text, new PdfPoint(xPositions[i], y));
    }
    y -= 20;

    // Data rows (4 paragraphs per row!)
    // Can only add a few rows before hitting 20-paragraph limit!

    document.Save("products.pdf");
}

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After (IronPDF) - No limits, proper HTML tables:

using IronPdf;

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

var html = @"
    <html>
    <head>
        <style>
            table { border-collapse: collapse; width: 100%; }
            th, td { border: 1px solid #ddd; padding: 8px; text-align: left; }
            th { background-color: #4CAF50; color: white; }
            tr:nth-child(even) { background-color: #f2f2f2; }
        </style>
    </head>
    <body>
        <table>
            <thead>
                <tr>
                    <th>Product</th>
                    <th>Price</th>
                    <th>Qty</th>
                    <th>Total</th>
                </tr>
            </thead>
            <tbody>
                <tr><td>Widget A</td><td>$19.99</td><td>5</td><td>$99.95</td></tr>
                <tr><td>Widget B</td><td>$29.99</td><td>3</td><td>$89.97</td></tr>
                <!-- Add hundreds or thousands of rows - no limit! -->
            </tbody>
        </table>
    </body>
    </html>";

var renderer = new ChromePdfRenderer();
var pdf = renderer.RenderHtmlAsPdf(html);
pdf.SaveAs("products.pdf");

using IronPdf;

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

var html = @"
    <html>
    <head>
        <style>
            table { border-collapse: collapse; width: 100%; }
            th, td { border: 1px solid #ddd; padding: 8px; text-align: left; }
            th { background-color: #4CAF50; color: white; }
            tr:nth-child(even) { background-color: #f2f2f2; }
        </style>
    </head>
    <body>
        <table>
            <thead>
                <tr>
                    <th>Product</th>
                    <th>Price</th>
                    <th>Qty</th>
                    <th>Total</th>
                </tr>
            </thead>
            <tbody>
                <tr><td>Widget A</td><td>$19.99</td><td>5</td><td>$99.95</td></tr>
                <tr><td>Widget B</td><td>$29.99</td><td>3</td><td>$89.97</td></tr>
                <!-- Add hundreds or thousands of rows - no limit! -->
            </tbody>
        </table>
    </body>
    </html>";

var renderer = new ChromePdfRenderer();
var pdf = renderer.RenderHtmlAsPdf(html);
pdf.SaveAs("products.pdf");

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This is the most significant improvement in the GemBox PDF migration. Tables that were impossible in GemBox PDF's free version work perfectly in IronPDF with full CSS styling support.

Critical Migration Notes

Coordinate to CSS Positioning

If you need pixel-perfect positioning (similar to GemBox PDF's coordinate system), use CSS absolute positioning:

<div style="position:absolute; left:50px; top:750px; font-size:24px;">
    Text positioned at specific coordinates
</div>

<div style="position:absolute; left:50px; top:750px; font-size:24px;">
    Text positioned at specific coordinates
</div>

HTML

Page Indexing

Both GemBox PDF and IronPDF use 0-indexed pages, making this aspect of the migration straightforward:

// GemBox PDF
var page = document.Pages[0];

// IronPDF
var page = pdf.Pages[0];

// GemBox PDF
var page = document.Pages[0];

// IronPDF
var page = pdf.Pages[0];

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Security Settings

// GemBox PDF
document.SaveOptions.SetPasswordEncryption(userPassword, ownerPassword);

// IronPDF
pdf.SecuritySettings.UserPassword = "userPassword";
pdf.SecuritySettings.OwnerPassword = "ownerPassword";

// GemBox PDF
document.SaveOptions.SetPasswordEncryption(userPassword, ownerPassword);

// IronPDF
pdf.SecuritySettings.UserPassword = "userPassword";
pdf.SecuritySettings.OwnerPassword = "ownerPassword";

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Troubleshooting

Issue 1: PdfFormattedText Not Found

Problem: PdfFormattedText doesn't exist in IronPDF.

Solution: Use HTML with CSS styling:

// GemBox PDF
var text = new PdfFormattedText { Text = "Hello", FontSize = 24 };

// IronPDF
var html = "<p style='font-size:24px;'>Hello</p>";
var pdf = renderer.RenderHtmlAsPdf(html);

// GemBox PDF
var text = new PdfFormattedText { Text = "Hello", FontSize = 24 };

// IronPDF
var html = "<p style='font-size:24px;'>Hello</p>";
var pdf = renderer.RenderHtmlAsPdf(html);

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Issue 2: DrawText Method Not Found

Problem: page.Content.DrawText() not available.

Solution: Create content via HTML rendering or use stampers:

// For new documents - render HTML
var renderer = new ChromePdfRenderer();
var pdf = renderer.RenderHtmlAsPdf("<h1>Content</h1>");

// For existing documents - use stampers
var stamper = new TextStamper() { Text = "Added Text" };
pdf.ApplyStamp(stamper);

// For new documents - render HTML
var renderer = new ChromePdfRenderer();
var pdf = renderer.RenderHtmlAsPdf("<h1>Content</h1>");

// For existing documents - use stampers
var stamper = new TextStamper() { Text = "Added Text" };
pdf.ApplyStamp(stamper);

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Issue 3: Document Loading Differences

Problem: PdfDocument.Load() not found.

Solution: Use PdfDocument.FromFile() or FromStream():

// GemBox PDF
var doc = PdfDocument.Load("input.pdf");

// IronPDF
var pdf = PdfDocument.FromFile("input.pdf");

// GemBox PDF
var doc = PdfDocument.Load("input.pdf");

// IronPDF
var pdf = PdfDocument.FromFile("input.pdf");

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Issue 4: Save Method Differences

Problem: document.Save() method signature differs.

Solution: Use SaveAs():

// GemBox PDF
document.Save("output.pdf");

// IronPDF
pdf.SaveAs("output.pdf");

// GemBox PDF
document.Save("output.pdf");

// IronPDF
pdf.SaveAs("output.pdf");

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Migration Checklist

Pre-Migration

Inventory all GemBox PDF usage in codebase
Identify coordinate-based layouts that need HTML conversion
Evaluate current paragraph limits affecting your code
Obtain IronPDF license key
Create migration branch in version control

Code Migration

Remove GemBox PDF NuGet package: dotnet remove package GemBox.Pdf
Install IronPdf NuGet package: dotnet add package IronPdf
Update namespace imports
Replace ComponentInfo.SetLicense() with IronPdf.License.LicenseKey
Convert PdfDocument.Load() to PdfDocument.FromFile()
Convert document.Save() to pdf.SaveAs()
Replace coordinate-based text with HTML content
Convert PdfFormattedText to HTML with CSS styling
Update merge operations to use PdfDocument.Merge()

Testing

Verify all documents generate correctly
Validate document appearance matches expectations
Test table generation (previously limited by 20-paragraph rule)
Verify text extraction works correctly
Test merge and split operations
Validate security/encryption functionality

Post-Migration

Remove GemBox PDF license keys
Update documentation
Train team on HTML/CSS approach for PDFs
Enjoy unlimited content without paragraph limits!

Curtis Chau

Chat with engineering team now

Technical Writer

Curtis Chau holds a Bachelor’s degree in Computer Science (Carleton University) and specializes in front-end development with expertise in Node.js, TypeScript, JavaScript, and React. Passionate about crafting intuitive and aesthetically pleasing user interfaces, Curtis enjoys working with modern frameworks and creating well-structured, visually appealing manuals.

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How to Migrate from GemBox PDF to IronPDF in C#

Why Migrate from GemBox PDF to IronPDF

The GemBox PDF Challenges

GemBox PDF vs IronPDF Comparison

Migration Complexity Assessment

Estimated Effort by Feature

Paradigm Shift

Before You Start

Prerequisites

Identify All GemBox PDF Usage

NuGet Package Changes

Quick Start Migration

Step 1: Update License Configuration

Step 2: Update Namespace Imports

Step 3: Basic Conversion Pattern

Complete API Reference

Namespace Mapping

Core Class Mapping

Document Operations

Page Operations

Text and Content Operations

Code Migration Examples

Example 1: HTML to PDF Conversion

Example 2: Merge PDF Files

Example 3: Add Text to PDF

Example 4: Creating Tables (The Biggest Improvement!)

Critical Migration Notes

Coordinate to CSS Positioning

Page Indexing

Security Settings

Troubleshooting

Issue 1: PdfFormattedText Not Found

Issue 2: DrawText Method Not Found

Issue 3: Document Loading Differences

Issue 4: Save Method Differences

Migration Checklist

Pre-Migration

Code Migration

Testing

Post-Migration

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