Async IO should be supported

[cfauchere]

Reporting an Issue Here

Expected Behavior

PDFSharp supports async API

Actual Behavior

PDFSharp does not support async API

Example

PdfReader.Open vs PdfReader.OpenAsync
PdfDocument.Save vs PdfDocument.SaveAsync

Why is it important?

Look at implementation of PdfDocument OpenFromStream it calls stream.Read(array, 0, 1024); which is blocking.
Blocking on IO can lead to threadpool starvation.

[ThomasHoevel]

There is PdfDocument.SaveAsync.

You can read the PDF file into a MemoryStream and use that with PdfReader.Open.

[nkosi23]

@ThomasHoevel Unfortunately it looks like PdfDocument.SaveAsync() is only available in the prerelease version, not in the latest stable. Before that, the method is only defined for UWP builds.