How do I stop IIS7 from putting out its own 404 before my MVC app gets a chance to handle it?

Question

I have an ASP.NET MVC 2 application, which has an Application_Error event handler in global.asax. In this, I\'m detecting the case where the Exception type is HttpException

Answer 1

The Answer by Flynn solved my issue of ASP.NET taking control of the 404

Now I am able to do this:

Response.TrySkipIisCustomErrors = true;
Response.StatusCode = 404;
Response.Write("");
HttpContext.Current.ApplicationInstance.CompleteRequest();