What ever happened to TypeMock Racer? It's nowhere to be found, and all your pages are out of date. (Lot's of 404's). I believe there is a community out there who struggles with unit testing parallel processing. I know I do, and I'm not afraid to admit :) NUnit, MsTest, and other xUnit-based test framework plugins and test runners have deficiencies that don't show the real stuff happening under the hood that matters, and swallows exceptions in foreign threads. TypeMock Racer could have helped? Try finding info on the net that doesn't bloat your production code with lot's of stupid threading workarounds in test frameworks. Geez. If I can see where a deadlock happens, I could spot my err and fix it. Now I can't. My poor threads are blocking (or being blocked) by test runner when not in debug mode. When running the tests in debug mode, suddenly all is well (under the surface, but strange things have been happening lately :)). Yes I have seen the apparent solutions, but none of them seems to be working for me. I'm now convinced that I've made a silly err, and now I'm paying the price. *sigh*