When trying Append 2 pages on single Page and create one pdf from pdf file containing 492 pages, I get the following message: cannot handle iref streams pdf merge: The current implementation of PDFsharp cannot handle this PDF feature introduced...
1) Add Drag and drop feature
2) When trying Append 2 pages on single Page and create one pdf containing 492 pages: from a pdf filea to cannot handle iref streams pdf merge: The current implementation of PDFsharp cannot handle this PDF feature...