PDFsharp & MigraDoc Foundation

Hi Team,
First of all thank you for this wonderful library. I am using PDFSharp for watermarking the pdf files. i would like to know if there is any api in PDFSharp to identify that a PDF is already watermarked? Any hint on this would be a great help.

Thanks,
Hyder

Watermarks aren't a PDF feature.
A watermark is just something drawn on pages. How should code decide what counts as a watermark?

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Best regards
Thomas
(Freelance Software Developer with several years of MigraDoc/PDFsharp experience)

Thanks Thomas for the quick reply and You're absolutely right, Determining what constitutes a watermark programmatically can be challenging. It may require additional image processing techniques,.

can we use heuristics method like comparing the text & font(water mark can use specific colour than the normal text in pdf, and font would be different and watermark text repeat always).? All these can be assumptions only.

By the way when i download Assemblies(PDFSharp) from NuGet package , the assemblies are not code signed(dont have digital signature), any specific reason or application developer need to sign the assemblies?

Thanks again.