Description of Problem:

HttpWebResponse.GetResponse() is causing problems under the debugger.  It seems to work running without the debugger. This has been tested with MonoTouch 4.0.2 and 4.0.3

Steps to reproduce the problem:

1. The easiest way to see it is to add the following to the OnRenderFrame method of the EAGLView class in the MonoTouch OpenGL template: 

HttpWebRequest.Create ("http://www.google.com").GetResponse ().Close();

Note, that it also causes a problem in other places, so not related to this method.  This is just an easy test case.

2. Debug under the simulator, the call usually works the first time.  Though, subsequent calls exit the app on the simulator and end the debug session.  Every once in awhile you get lucky, so try this a few times and should see the issue.