VS 2010 Test Runner error “The agent process was stopped while the test was running.”

Question

In Visual Studio 2010, I have a number of unit tests. When I run multiple tests at one time using test lists, I sometimes reveive the following error for one or more of the

Answer 1

I encountered the same Problem and solved it while Removing

Environment.Exit(0);

So i am pretty sure, that this error occurs while your test or method under test, is causing the executing process to terminate.