嗨，我正在为程序测试一些东西，每次测试完成时，都会显示一个新的消息框。问题在于，在此之前我关闭消息框后，只会打开一个新的消息框。我尝试将消息框放到新任务中，但是那也不起作用...

Task.Run(() => System.Windows.MessageBox.Show(
                dirs[directory] + " is done, it took " + stopwatch.Elapsed,
                "Done with " + dirs[directory],
                System.Windows.MessageBoxButton.OK,
                System.Windows.MessageBoxImage.Information,
                System.Windows.MessageBoxResult.OK,
                System.Windows.MessageBoxOptions.ServiceNotification));

我还尝试使方法异步并等待Task.Run，​​那里也没有运气

 await Task.Run(() => System.Windows.MessageBox.Show(
                dirs[directory] + " is done, it took " + stopwatch.Elapsed,
                "Done with " + dirs[directory],
                System.Windows.MessageBoxButton.OK,
                System.Windows.MessageBoxImage.Information,
                System.Windows.MessageBoxResult.OK,
                System.Windows.MessageBoxOptions.ServiceNotification));