public partial class MainWindow : Form
    {
        UpdateData Update = UpdateData.GetInstance();
        SystemClock Clock = SystemClock.GetInstance();

        public MainWindow()
        {
            InitializeComponent();        
        }

        private void btnStart_Click(object sender, EventArgs e)
        {
            Update.Start();
            Clock.Start();
        }

        private void btnStart_Click(object sender, EventArgs e)
        {
            Update.End();
            Clock.End();
        }
    }


    public sealed class SystemClock
    {
        // Singleton
        public static readonly SystemClock instance = new SystemClock();
        public static SystemClock GetInstance()
        {
            return instance;
        }

        TimingController Timing = new TimingController();

        //启动了定时器去运行 Timing.Run
        Timing.Run();
    }

    public class TimingController
    {
        UpdateData Update = UpdateData.GetInstance();
        SystemClock Clock = SystemClock.GetInstance();

    private void End()
        {
            Clock.End();
            Update.End();
        }
    }