افزودن هدر به PDF از طریق C#

    // Open document
    Document pdfDocument = new Document(dataDir+ "TextinHeader.pdf");

    // Create header
    TextStamp textStamp = new TextStamp("Header Text");
    // Set properties of the stamp
    textStamp.TopMargin = 10;
    textStamp.HorizontalAlignment = HorizontalAlignment.Center;
    textStamp.VerticalAlignment = VerticalAlignment.Top;
    // Add header on all pages
    foreach (Page page in pdfDocument.Pages)
    {
        page.AddStamp(textStamp);
    }

    // Save updated document
    pdfDocument.Save(dataDir+ "TextinHeader_out.pdf");