.debug

If you happen to encounter this issue (in my case it’s Windows 7) while unit-testing a program with a third-party DLL (like something from CodeProject), just right click on the “offending” DLL, then under “General” tab, there is a Security option in the bottom that reads “This file came from another computer and might be blocked…”. Just click on the “Unblock” button and the problem will go away.