public void SetData()
        {
            while (true)
            {
                Thread.Sleep(1000);
                ThreadFunction();

                return;
            }
        }

        private void ThreadFunction()
        {
            Action fc = () => textBox1.Text = DateTime.Now.ToString();
            if (textBox1.InvokeRequired)
            {
                textBox1.BeginInvoke(fc);
            }
            else
            {
                fc();
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Thread thread = new Thread(SetData);
            thread.IsBackground = true;
            thread.Start();
            thread.Join();
            MessageBox.Show("xieshaobin");
        }