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Unable to verify digital signature


I want to verify a digitally Signed PDF, below is the code

GroupDocs.Signature.Signature signature = new Signature("sample_signed.pdf");

but I am getting the error which states

CS0234 C# The type or namespace ‘Signature’ does not exist in the namespace ‘GroupDocs.Signature’ (are you missing an assembly reference?)

my groupdocs version is 19.6, what can be the issue here?


Signature class is implemented in API version 19.8 (and onwards). But you are using an older version of the API. Please have a look at these migration notes and this documentation article on signatures verification.

Thanks a lot for your time

1 Like


You’re welcome.