I creating a windows form application. I Referenced that test dll. In a button's click event created an instance of the test class. Nothing can go wrong right? I have done this at least a million times. Well ...same problem on the workstation. Does anyone has an idea? There are no other dependencies. There is nothing that can cause such a hang. ...hmmm...Just thought of something. I'm going to try to run a release build. I don't expect much out of this, but who knows what compiler optimizations might come up with. I tried this and the release builds does exactly the same. An empty app with just a button and reference to a dll that contains only a test class that has a ctor, dtor, and one string member only. It still hangs at creation of a test class object. Does anyone has suggestions? At this point I am wondering if this is not a problem that has to do with the .Net installation on the client station. Although this happens on more than one client station.... How can I debug this? On a client station nonetheless. Dewm Solo - Managed C++ Developer modified on Tuesday, December 18, 2007 2:53:56 PM