The type initializer for '' threw an exception

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Issue: when you try to launch visual studio throw command prompt you might run into the following error

 

Reason:

Because of conflict with the .Net versions the error is thrown.

Solution:

Clear the vairable complus_version or set the complus_Version to latest .NET version. In my case I changed from v.2.0.xxxx. to v4.0.30319. you can verify the latest .Net version from the folder  C:\Windows\Microsoft.NET\Framework