I am trying to deploy a SharePoint solution using Visual Studio. This solution references a
AjaxControlToolkit.dll and upon deploying, I get following error:
Cannot add the specified assembly to the global assembly cache: AjaxControlToolkit.dll
I have searched about this issue and found one Powershell to deploy that DLL into the GAC which worked successfully but when I deploy the solution again from VS, it throws this error. Cannot remove DLL from my project either because it won't compile. I am part of
Administrators group on this machine and running VS as administrator.
How do I fix this issue?