Problems with custom fonts an export from XPS to PDF in Net6

[jogibear9988]

In dotnet6 something seems to be changed in xps format, so fonts could not be found in some way

[jogibear9988]

seems already this call here:

PdfSharp/PDFsharp/code/PdfSharp.Xps/PdfSharp.Xps.XpsModel/FixedPayload.cs

Line 286 in 6000391

byte[] fontData = this.payload.GetFontData(uriString);

get's different font data if the xps is created with net6, but the xps seems correct (because windows and other tools can read it)