Thread Security changes in 2.0

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While I was looking into CAS changes in 2.0 I found some very good news about thread changes in 2.0.  In .NET 2.0 both Thread.CurrentPrincipal and the Thread Impersonation token are now propagated amongst threads including ThreadPool.QueueUserWorkItem.  The latter was a great pain to developers in .NET 1.0 particularly because Thread.CurrentPrincipal did not propagate and it created a lot of funny code to deal with the CAS impacts. 

This MSDN article delves into these changes.  https://msdn.microsoft.com/msdnmag/issues/04/11/NETMatters/