typeloadexception

Can you show me a way to troubleshoot System.TypeLoadException ? I am having this exception for an existing project in my solution which I reference from a unit test project in the same solution. This exeption is thrown when I run my unit tests. They fail because of this exception: Details: Test method MyErrorHandler.Test.MyTest.Parse_RecievesValidMessage_ReturnsArray threw exception: System.TypeLoadException: Could not load type 'MyTestNameSpace' from assembly 'MyTestAssemblyName.Test, Version=1.0.0.0, Culture=neutral, PublicKeyToken=Somenumber. What should I check or where should I start to

I've got a very weird bug on our test machine. The error is: System.TypeLoadException: Method 'SetShort' in type 'DummyItem' from assembly 'ActiveViewers (...)' does not have an implementation. I just can't understand why. SetShort is there in the DummyItem class, and I've even recompiled a version with writes to the event log just to make sure that it's not a deployment/versioning issue. The weird thing is that the calling code doesn't even call the SetShort method. NOTE - If this answer doesn't help you, please take the time to scroll down through the other answers that people have added