افزودن مهر تصویر پی دی اف از طریق C#

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

// Create image stamp
ImageStamp imageStamp = new ImageStamp(dataDir + "aspose-logo.jpg");
imageStamp.Background = true;
imageStamp.XIndent = 100;
imageStamp.YIndent = 100;
imageStamp.Height = 300;
imageStamp.Width = 300;
imageStamp.Rotate = Rotation.on270;
imageStamp.Opacity = 0.5;
// Add stamp to particular page
pdfDocument.Pages[1].AddStamp(imageStamp);

dataDir = dataDir + "AddImageStamp_out.pdf";
// Save output document
pdfDocument.Save(dataDir);