A generic Principal interface (IPrincipal) to enable strong typing of custom Identities (IIdentity)

I’ve been playing in the security rhelm lately and came up with the
following:

public interface IPrincipal<T> where  T : IIdentity {

      T Identity { get; }
      bool IsInRole(string role);
}

This enables me to retrieve any custom properties from my custom identity without boxing and unboxing:

public interface ICustomIdentity : IIdentity {
    string CustomProperty { get; }
}

The next step would be to get this to work with impersonation. I can’t store this on the Thread (Thread.CurrentPrincipal) but I can create my own registry where I can retrieve it from.

I am thinking that this might be resolved if I were simply using CardSpace in my application.

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