How To: Implement IPrincipal in ASP.NET 2.0

[new7world7]

Anyone know of resources How To: Implement IPrincipal in ASP.NET 2.0.

Particularly for Forms Authentication.

When should the Custom Principal be assigned to
System.Web.HttpContext.Current.User ?

Particularly when using the asp:Login control using the OnLoggedIn
event

if(HttpContext.Current.User.Identity.IsAuthenticated)
System.Web.HttpContext.Current.User = MyCustomPrincipal



Also should my custom properties be in the IPrincipal or a custom
IIdentity?

Thanks in advance!