I recently had to deal with this issue in which I had created a unit test project with references to all the right Visual Studio quality dlls, and a well formed unit test class with all the pretty [TestClass] and [Test] attributes, but for some reason...

I'm talking about client side async calls -- i.e. when you use svcutil /a to generate async methods for your WCF service. This is usually rare, but happened to me yesterday -- I was getting nulls back in the EndResponse. I tried a lot of things -- dug...