Does anyone have know how I can step into system.web.mvc? I am getting an error (Cannot create an abstract class) that is buried in the System.Web.Mvc.DefaultModelBinder.CreateModel method, and I can’t tell which part of my code is causing the issue.
I was advised that I could download the sourcecode from codeplex, (actually microsoft.com/downloads as I am using 1.0), build in Debug and then step through. I tried, unfortunately the system.web.mvc was installed in GAC, thus causing an ambiguous call, and gacutil would not allow me to uninstall, so tried by hand removing from the registry (HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Global\system.web.mvc). when I ran my program it was still reporting an ambiguous call.
Background
A couple of weeks ago I had a problem where MVC was throwing up a YSOD, but I could not step into the code to find the problem because the issue was I was doing something wrong, that was not being picked up until it was in the framework (in this case, by thrashing around blindly for a day I found it was that I didn’t have a default empty constructor on one of the classes within my viewmodel). Now I am getting a different error (Cannot create an abstract class) that is buried in the System.Web.Mvc.DefaultModelBinder.CreateModel method, but I don’t know what part of my code is causing the error in the framework.
It’s a little involved, but you can do it. Steve Sanderson has step-by-step instructions.