Hello,
I have the same issue as the original poster. I have just upgraded to the latest version of Visual Studio and SQL Server Data Tools and have reset all settings as you suggested. When I open the solution containing the unit tests, it builds fine... until I try to run the tests, or open the Test Explorer. Then I get the "Unexpected error detected. Check the Tests Output Pane for details" error. The stack trace is exactly as originally posted. Any ideas?
