افزودن هدر به PDF از طریق C#

var inputFile = Path.Combine(dataDir, "TextinHeader.pdf");
var outputFile = Path.Combine(dataDir, "TextinHeader_out.pdf");
var pdfDocument = new Aspose.Pdf.Document(inputFile);

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