Cedric, Thanks a lot for your help and your code works for me perfectly. The reason that I need a PDF File is that our API needs to return the byte[] of the PDF file with the annotations. Not sure if the AnnotationManager can do that. Now, I need to set up the annotation properties, such as location...

Hi Cedric, Thanks for your quick response. What I am doing is on server side, which is a web API function. Here is how my code look like: using (var pdfFile1 = new GdPicturePDF()) { pdfFile1.LoadFromFile($"c:\\temp\\1 page II.pdf", true); pdfFile1.SetOrigin(PdfOrigin.PdfOriginTopLeft); pdf...

Hi Kevin, I am having the same issue that the AddAnnotationFromXML does not add the annotation. Could you please share your solution here?

Thanks a lot in advance.