mscorlib internal exception ANY IDEA ?

System.InvalidOperationException was unhandled

Message="The Undo operation encountered a context that is different from what was applied in the corresponding Set operation. The possible cause is that a context was Set on the thread and not reverted(undone)."

Source="mscorlib"

StackTrace:

at System.Threading.SynchronizationContextSwitcher.Undo()

at System.Threading.ExecutionContextSwitcher.Undo()

at System.Threading.ExecutionContext.runFinallyCode(Object userData, Boolean exceptionThrown)

at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteBackoutCodeHelper(Object backoutCode, Object userData, Boolean exceptionThrown)

at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)

at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)

at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

at System.Net.ContextAwareResult.Complete(IntPtr userToken)

at System.Net.LazyAsyncResult.ProtectedInvokeCallback(Object result, IntPtr userToken)

at System.Net.Sockets.Socket.ConnectCallback()

at System.Net.Sockets.Socket.RegisteredWaitCallback(Object state, Boolean timedOut)

at System.Threading._ThreadPoolWaitOrTimerCallback.PerformWaitOrTimerCallback(Object state, Boolean timedOut)