FormsAuthentication Expired Cookie

[Brian Shannon]

Question:

When using forms authentication and the cookie expires the user is
redirected back to the login.aspx page. I wan to display a message saying
your time has expired please login again.

In the page load of login.aspx I test for the User.Identity.IsAuthenticated

If the cookie is expired the user wont be authenticated anymore and the
ticket is deleted. So how can I access the Expired property of
FormsAuthentication.Expired?

I am sure I am missing something!

Thanks