什么是你的关机模式？如果是明确的，那是因为你没有明确关闭。如果它的主窗口，那是因为你还没有分配的主窗口 Application.MainWindow 。

What is your shutdown mode? If it's explicit, then it's because you're not explicitly shutting down. If it's main window, it's because you've not assigned the main window to Application.MainWindow.