Error 'System.InvalidOperationException: 'Byte[]' must not be null here.'

[evgenyshugaev]

Hello.
We are using package PdfSharp (6.2.3) with net9.0.
And some simpe code for merging image to pdf:

			var ms = new MemoryStream(content, 0, content.Length, true, publiclyVisible: true);
			var document = PdfReader.Open(ms, PdfDocumentOpenMode.Modify);
				
            for (int i = 0; i < document.PageCount; i++)
			{
					try
					{
			            // error here
                        using XGraphics gfx = XGraphics.FromPdfPage(page);

                        // ... some code

					}
					catch (Exception ex)
					{
						Logger.Log(ex, ExceptionSource.WebForm);
					}
			`}`

and we have got error for pages 12, 13, 15. Files with issue uploaded to your ftp server with name pdfsharp6-2-3-error-FromPdfPage.zip

[ThomasHoevel]

The PDF file is valid, but unusual.

PDFsharp 6.2.4 (coming 2026) will handle it correctly.