Unable to load types from the test source '{0}'. Some or all of the tests in this source may not be discovered. If you are ...

Unable to load types from the test source '{0}'. Some or all of the tests in this source may not be discovered. If you are running unit tests for Windows Store apps and referencing custom WinMD type then please visit http://go.microsoft.com/fwlink/?LinkId=238340 for more info. Error details: {1}.