using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;

namespace ThreadTest
{
    public partial class Form1 : Form
    {
        private String _text = String.Empty;

        public Form1()
        {
            InitializeComponent();
            this.backgroundWorker1.DoWork += new DoWorkEventHandler(backgroundWorker1_DoWork);     
            this.timer1.Interval = 200;
            this.timer1.Tick += new EventHandler(timer1_Tick);

            this.backgroundWorker1.RunWorkerAsync();
            this.timer1.Start();
        }

        void timer1_Tick(object sender, EventArgs e)
        {
            this.textBox1.Text = _text;
        }

        void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
        {
            while (true)
            {
                _text += "昊天金阙无上至尊自然妙有弥罗至真玉皇上帝\r\n";
                Thread.Sleep(200);
            }
        }
    }
}