How to generate an 401 error programmatically in an ASP.NET page

Question

As you can see this is a question from a non web developer. I would like to have an ASPX page which, under certain circumstances, can generate a 401 error from code. Ideally

Answer 1

You should be able to just use the following, according to MSDN.

Throw New HttpException(401, "Auth Failed")

Edit After seeing the other responses setting the status code would be more appropriate.