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Add Attachments
using IronPdf;
using System.IO;

// Instantiate the Renderer and create PdfDocument from HTML
var renderer = new ChromePdfRenderer();
var myPdf = renderer.RenderHtmlFileAsPdf("my-content.html");

// Load your own attachment
byte[] attachment = File.ReadAllBytes("path/to/attachment");

// Here we can add an attachment with a name and a byte[]
PdfAttachment exampleAttachment = myPdf.Attachments.AddAttachment("exampleAttachment", attachment);

// And here is an example of removing an attachment
myPdf.Attachments.RemoveAttachment(exampleAttachment);

myPdf.SaveAs("my-content.pdf");
Imports IronPdf
Imports System.IO

' Instantiate the Renderer and create PdfDocument from HTML
Dim renderer As New ChromePdfRenderer()
Dim myPdf = renderer.RenderHtmlFileAsPdf("my-content.html")

' Load your own attachment
Dim attachment As Byte() = File.ReadAllBytes("path/to/attachment")

' Here we can add an attachment with a name and a byte()
Dim exampleAttachment As PdfAttachment = myPdf.Attachments.AddAttachment("exampleAttachment", attachment)

' And here is an example of removing an attachment
myPdf.Attachments.RemoveAttachment(exampleAttachment)

myPdf.SaveAs("my-content.pdf")
NuGet Download
PM > Install-Package IronPdf
Add Attachments

Add Attachments

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C# NuGet Library for PDF
Install with NuGet

Version: 2026.10

PM > Install-Package IronPdf
nuget.org/packages/IronPdf/
  1. In Solution Explorer, right-click References, Manage NuGet Packages
  2. Select Browse and search "IronPdf"
  3. Select the package and install
C# PDF DLL
Download DLL

Version: 2026.10

or download Windows Installer here.

  1. Download and unzip IronPDF to a location such as ~/Libs within your Solution directory
  2. In Visual Studio Solution Explorer, right click References. Select Browse, "IronPdf.dll"

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