Version PDFsharp-1_50-beta3b.zip fixes some bugs we found with version PDFsharp-1_50-beta3a.zip.
Please use PDFsharp-1_50-beta3b.zip or PDFsharp-MigraDocFoundation-1_50-beta3b.zip respectively.

Fixed with beta 3a:
Bug: File not closed after call to PdfDocument.Save().
Bug: XPrivateFontCollection for GDI build sometimes caused exceptions.

Fixed with beta 3b:
Bug: Exception when opening some PDF files.