Hi, It looks like use of Pex and moles causes
Visual Studio debugger to behave very strange. When unhandled exception is thrown, the execution of unit test continues on! More than that, the function appears to execute twice! Even further, its behavior changes to a different wrong behavior when compiled against CLR 2.0 vs. CLR 4.0! Environment: Visual Studio 2010 Beta 2, NUnit 2.5.2, Pex 0.19...