COMException: Exception from HRESULT: 0x88980406 StackTrace: at System.Windows.Media.Composition.DUCE.Channel.SyncFlush() at System.Windows.Media.MediaContext.NotifyChannelMessage() at System.Windows.Media.MediaContextNotificationWindow.MessageFilter(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs) at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)