PDFLib.NET dll for .NET Framework4.0?

Question

I have developed a searchable PDF viewer in .NET2.0. We are now upgrading our application to 4.0 so that PDFLibNet.dll is compatible with this version.

The message is:

Could not load file or assembly 'PDFLibNet, Version=1.0.6.8, Culture=neutral, 
PublicKeyToken=26d87f7d66fb2aee' or one of its dependencies. 
Strong name signature could not be verified.  The assembly may have been tampered with, or 
it was delay signed but not fully signed with the correct private key. (Exception from     HRESULT: 0x80131045) 

Any suggestions?

Answer 1

PDFLib.NET dll does not support to 4.0 but compatible with 3.5!

But the below link explains that how to take a build to 4.0 it fails. works only with 3.5

http://blogs.lessthandot.com/index.php/DesktopDev/MSTech/use-pdfviewernet-in-a-project