InvalidOperationException: 正在關閉視窗時，無法將 Visibility 設定成 Visible，或呼叫 Show、ShowDialog、Close 或 WindowInteropHelper.EnsureHandle。
StackTrace:
   於 System.Windows.Window.VerifyNotClosing()
   於 System.Windows.Window.InternalClose(Boolean shutdown, Boolean ignoreCancel)
   於 System.Windows.Window.OnDeactivated(EventArgs e)
   於 System.Windows.Window.HandleActivate(Boolean windowActivated)
   於 System.Windows.Window.WmActivate(IntPtr wParam)
   於 System.Windows.Window.WindowFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   於 System.Windows.Interop.HwndSource.PublicHooksFilterMessage(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)