WP7 自定义时钟

　　　　/// <summary>
        /// 时钟
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
        {
            dt = new DispatcherTimer();
            dt.Interval = TimeSpan.FromMilliseconds(1000);
            dt.Tick += new EventHandler(dt_Tick);
            dt.Start();
        }
        private void dt_Tick(object sender, EventArgs e)
        {
            //
            //执行
            //
            dt.Stop();
        }