ContextCallback is used by the ExecutionContext.Run and the SecurityContext.Run methods. ContextCallback represents the method to be run in the provided context. Upon completion of the method execution, the context is restored to its previous state.
Create the delegate by passing your callback method to the ContextCallback constructor. Your method must have the signature shown here.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)