I am debugging codeplex simple project. I am using
I have not modified any code
I have tried all of the above solutions and others from other websites too but with no luck.
What worked for me, was to rename or delete the applicationhost file:
C:\Users\User\Documents\IISExpress\config\applicationhost < rename or delete.
For some poor souls out there starting using TypeMock on ASP.NET unit tests like me, you need to disable it in Visual Studio to avoid this error: In Tools->Add-in Manager, untick the boxes for TypeMock Isolator. I guess you need to switch this back on for your unit tests.