I Used the GenericPriciple and GenericIdentity to authorize a user, then assigned Context.User the GenericPrinciple object but when i Access the User.IsInRole() i always get a "False" result. The User.Identity.Name however works just fine... What can possibly be wrong?

Also, I'm curious about the Global.asax Application_AuthenticateRequest, should I put the authorization code there, or in my Login.aspx.cs file?

You have to attache the generic prinicpal to the current user context. usually a good place to do it is the application_authenticaterequest event handler becuase this event is fired on every request.

So move your code that creates a prinicapl and identity object in to the application_authenticaterequest event handler and attache it to to current user.

HTH

-aka

Ah, thanks a bunch, that was exactly what I wanted to do!

Is it "good customs" to extend the GenericPricipal class and adding more options, or is the base functionality enough?

Good.

I am not following the adding more options part in your posting. But all you need is to pass identity and roles information to an instance of Genericprinicpal object.

HTH

-aka