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private void btnRun_Click(object sender, EventArgs e)

{

    Task t = new Task(() =>

    {

        this.Invoke(new Action(() =>

        {

            txtStatus.AppendText("任務(wù)開始..."+System.Environment.NewLine);

        }));

        Thread.Sleep(1000);

    });

    t.Start();

    t.ContinueWith(t =>

    {

        this.Invoke(new Action(() =>

        {

            txtStatus.AppendText("IsCanceled="+ t.IsCanceled + ",IsCompleted="+ t.IsCompleted + ",IsFaulted="+ t.IsFaulted);

            txtStatus.AppendText("任務(wù)完成..." + System.Environment.NewLine);

        }));

    });

txtStatus.AppendText("Run 完成..." + System.Environment.NewLine);

}