Yesterday when I was running my Unit Test Cases from Visual Studio Test Explorer, I found that few of my test cases have been skipped by Visual Studio. I wondered why it happened. Then I did some googling & found that it a piece of code in my Unit Test case which was causing Visual Studio Test Explorer to display status as Skipped instead of Completed.
Assert.Inconclusive("Warning Message");
Yes, It was Assert.Inconclusive() method that was causing the issue. Whenever test runner encounter this line of code in your unit test, it marks that unit test case as skipped & displays it with a warning triangle.
In this case, Test Runner actually is not skipping any of your tests cases but somehow misguiding you with its status :)