CreateFileAttachment

public void CreateFileAttachment(Rectangle rect, string contents, string filePath, int page, 
    string name)

PdfContentEditor editor = new PdfContentEditor();
editor.BindPdf("example.pdf");
editor.CreateFileAttachment(new System.Drawing.Rectangle(0, 0, 100, 100),
    "Welcome to Aspose", "attachment_file.pdf", 1, "Graph");
editor.Save("example_out.pdf");

public void CreateFileAttachment(Rectangle rect, string contents, string filePath, int page, 
    string name, double opacity)

PdfContentEditor editor = new PdfContentEditor();
editor.BindPdf("example.pdf");
editor.CreateFileAttachment(new System.Drawing.Rectangle(0, 0, 100, 100),
    "Welcome to Aspose", "attachment_file.pdf", 1, "Graph", 0.5);
editor.Save("example_out.pdf");

public void CreateFileAttachment(Rectangle rect, string contents, Stream attachmentStream, 
    string attachmentName, int page, string name)

PdfContentEditor editor = new PdfContentEditor();
editor.BindPdf("example.pdf");
using(System.IO.FileStream attStream = System.IO.File.OpenRead("attachment_file.pdf"))
{
    editor.CreateFileAttachment(new System.Drawing.Rectangle(0, 0, 100, 100),
        "Welcome to Aspose", attStream, "attachment_file.pdf", 1, "Graph");
    editor.Save("example_out.pdf");
}

public void CreateFileAttachment(Rectangle rect, string contents, Stream attachmentStream, 
    string attachmentName, int page, string name, double opacity)

PdfContentEditor editor = new PdfContentEditor();
editor.BindPdf("example.pdf");
using(System.IO.FileStream attStream = System.IO.File.OpenRead("attachment_file.pdf"))
{
    editor.CreateFileAttachment(new System.Drawing.Rectangle(0, 0, 100, 100),
        "Welcome to Aspose", attStream, "attachment_file.pdf", 1, "Graph", 0.5);
    editor.Save("example_out.pdf");
}