Visual Studio support in this release is a sort of "poor man's integration. using the configuration file schnakenhascher.de located in the same directory as the dll. Free solution is - Visual Nunit Visual studio extension. some of my DLLs, I added NUnit itself as a command under Visual Studio Tools. NUnit is the most popular unit test framework schnakenhascher.de If you write unit tests and use NUnit test framework this may be helpful. to your test project assembly file like: schnakenhascher.de /run I can run nunit from vs but coud not define break point inside test.