public static void DoEvents()
{
// Create new nested message pump.
var nestedFrame = new DispatcherFrame();
// Dispatch a callback to the current message queue, when getting called,
// this callback will end the nested message loop.
// note that the priority of this callback should be lower than that of UI event messages.
DispatcherOperation exitOperation = Dispatcher.CurrentDispatcher.BeginInvoke(
DispatcherPriority.Background, exitFrameCallback, nestedFrame);
// pump the nested message loop, the nested message loop will immediately
// process the messages left inside the message queue.
Dispatcher.PushFrame(nestedFrame);
// If the "exitFrame" callback is not finished, abort it.
if (exitOperation.Status != DispatcherOperationStatus.Completed)
{
exitOperation.Abort();
}
}