WPF窗体右上角叉叉退出应用程序

        private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
        {
            if (MessageBox.Show("是否确认退出?", "温馨提示", MessageBoxButton.YesNo) == MessageBoxResult.Yes)
            { 
                Application.Current.Shutdown();
            }
            else
            {
                e.Cancel = true;
            }

        }