Need public method to prevent RequestHandler from altering response on 404 status

[OMGPizzaGuy]

I have need to return 404 on requests and return content, but the RequestHandler will replace the returned content even when Response.TrySkipIisCustomErrors = true;

I found a workaround of setting HttpContext.Items["404handler:handled"] = true; but I would like a supported method to prevent the response from being altered.

Thanks!

[Hyoe]

I'm also experiencing the same issue and having to use the same workaround as @OMGPizzaGuy

[marisks]

Is the URL that returns 404 added to the redirects list?
The RequestHandler does not replace any content, it just redirects if it finds a URL in the redirect list, otherwise, IIS will handle the 404 status code.

[marisks]

I see that it clears response. Probably that's what is causing the issue.