when I try to test sample code of Aspose given in Adding Image Stamp in PDF File - Control Image Quality when Adding a Stamp:
Document doc = new Document(“PdfWithText.pdf”);
ImageStamp stamp = new ImageStamp(“butterfly.jpg”);
stamp.Quality = 10;
I got an error: ‘Aspose.Pdf.ImageStamp’ does not contain a definition for ‘Quality’ and no extension method ‘Quality’ accepting a first argument of type ‘Aspose.Pdf.ImageStamp’ could be found (are you missing a using directive or an assembly reference?)
What should I add to the code to resolve this problem?