AccessViolationException: 嘗試讀取或寫入受保護的記憶體。這通常表示其他記憶體已損毀。
StackTrace:
   於 System.Windows.Media.Composition.DUCE.UnsafeNativeMethods.MilComposition_PeekNextMessage(IntPtr pChannel, Message& message, IntPtr messageSize, Int32& messageRetrieved)
   於 System.Windows.Media.Composition.DUCE.Channel.PeekNextMessage(Message& message)
   於 System.Windows.Media.MediaContext.NotifyChannelMessage()
   於 System.Windows.Media.MediaContextNotificationWindow.MessageFilter(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   於 MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   於 MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   於 System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   於 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)