Debug .NET web applications without timing out

This happens when you are hosting the web application in IIS.  Just open up IIS, click on the application pool and go to Advanced Settings.  Set Ping Enabled to False.  Apparently IIS pings itself occasionally and if it doesn't get a response, then it shuts down.  Keep in mind that while you are debugging, IIS is blocking all other requests, so it sees this as a bad thing.  So turning this behavior off during development is fine.