title: How do I generate a 404 error from an HttpModule?
body: <p>I have an ASP.NET HttpModule that handles HttpApplication.BeginRequest to redirect some requests to other files.  Typically I'll do something like parse the request, write a file to HttpContext.Current.Response.OutputStream then call HttpApplication.CompleteRequest().  For some requests I can't find the relevant file - how do I return a 404 error?</p>