My .NET site is working fine on Localhost. But, on my Server. I get this error.
"Could not load type 'System.Runtime.CompilerServices.ExtensionAttribute' from assembly 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'."
(Can't post screenshot, due to Stack Overflow policy)
It's something to do with asp:ScriptManager. I have used it before on the same server, but now, it's showing an error.
PS: When I remove Scriptmanager, the code runs fine.
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.272
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