Using the ASP.NET MVC source code to debug your app

Instead of just reading the MVC Framework source code in the abstract, one of the best ways of understanding what’s going on is to put it directly into your application’s solution. You can include the System.Web.Mvc C# project in your solution (as if you created it!), and then handily step into and out of its code while debugging, or use Visual Studio’s Go to Declaration command (or ReSharper’s) to navigate from your framework class references directly into the source.