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

I answered that in another post: ASP.NET Application hosted on IIS7 that is ignoring custom errors and falls back to IIS errors

"To disable the IIS error messages you have to set

  Response.TrySkipIisCustomErrors = true;

in your error page. After that, your Error messages should show without problem."