Introduction

public static void AddAttachments()
{
  Console.WriteLine( "=== ADD ATTACHMENTS ===" );
  var outputFileName = "AddAttachments.pdf";
  var outputPath = AttachmentsSample.AttachmentsSampleOutputDirectory + outputFileName;

  // Create a pdf document.
  using( var pdfOutput = PdfDocument.Create( outputPath ) )
  {
    // Get the first page of the document.
    var page = pdfOutput.Pages.First();

    // Add title.
    var textStyle = TextStyle.WithFont( pdfOutput.Fonts.GetStandardFont( StandardFontType.Helvetica ), 15d );
    page.AddParagraph( "Add attachments", textStyle, new ParagraphStyle( ParagraphHorizontalAlignment.Center ) );

    // Add text.
    page.AddText( "This document contains 2 attachments.", new Point( 100, 100 ) );

    // Create an attachment from a path.
    var attachment = new Attachment( AttachmentsSample.AttachmentsSampleResourcesDirectory + "BasicTextInfo.pdf" );
    attachment.Description = "The Info";
    pdfOutput.Attachments.Add( attachment );

    // Create an attachment from a stream.
    var imageBytes = File.ReadAllBytes( AttachmentsSample.AttachmentsSampleResourcesDirectory + "Image_1.jpg" );
    var attachment2 = new Attachment( "myImage", new MemoryStream( imageBytes ) );
    attachment2.Description = "The Image";
    pdfOutput.Attachments.Add( attachment2 );

    // Save the output document.
    pdfOutput.Save();
    Console.WriteLine( $"Info exported to path: {outputFileName}" );
  }
}