WPF 彈窗

  void NoticeWindow_Loaded(object sender, RoutedEventArgs e)
        {
            tbx_msg.Text = MSG;
            NoticeWindow self = sender as NoticeWindow;
            if (self != null)
            {
                self.UpdateLayout(); 
                SystemSounds.Asterisk.Play();//播放提示聲
                self.Top = 10 + self.ActualHeight;
                DoubleAnimation animation = new DoubleAnimation();
                animation.Duration = new Duration(TimeSpan.FromMilliseconds(500));
                animation.From = SystemParameters.WorkArea.Bottom;
                animation.To = SystemParameters.WorkArea.Bottom - self.ActualHeight;
                self.BeginAnimation(Window.TopProperty, animation);
                Task.Factory.StartNew(delegate
                {
                    System.Threading.Thread.Sleep(TimeSpan.FromSeconds(5));//通知持續5s後消失
                    System.Windows.Application.Current.Dispatcher.Invoke(
                             new Action(() =>
                             {
                                 animation = new DoubleAnimation();
                                 animation.Duration = new Duration(TimeSpan.FromMilliseconds(500));
                                 animation.Completed += (s, a) => { self.Close(); };//動畫執行完畢，關閉當前窗體
                                 animation.From = SystemParameters.WorkArea.Bottom - self.ActualHeight;
                                 animation.To = SystemParameters.WorkArea.Bottom;
                                 self.BeginAnimation(Window.TopProperty, animation);
                             }));
                });
            }
        }
    }