How to end request with 404 in an IHttpModule?

Question

I'm writing a new IHttpModule. I would like to invalidate certain requests with 404 using a BeginRequest event handler. How do I terminate the request and return a 404?

Answer 1

You can explicitly set the status code to 404 like:

HttpContext.Current.Response.StatusCode = 404; 
HttpContext.Current.Response.End();

Response will stop executing.