OK then, so you're safe. I know that their are various express releases and some of them are limited in what they support. I haven't loaded and tested that code yet. But the net45 test program is just a set of tests, not NUnit. It is of course built for .NET 4.5. Simone is working on making sure it will run under NUnit so it may not yet be complete. Note that some code in nunit.core.tests is under the control of #if statements, which keep it from being compiled when not wanted. Charlie On Tue, Oct 2, 2012 at 12:03 PM, Jv