c#用一个线程同步的简单例子

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

namespace csharp_xmlTransPortTest
{
    public partial class Form1 : Form
    {
        public delegate void ThreadProcess();
        public Form1()
        {
            InitializeComponent();


        }

        XmlDocument statusDoc = new XmlDocument();
        public void xx()
        {
            thread0 = new Thread(new ThreadStart(startedcross));
            thread0.Start();
            thread1 = new Thread(new ThreadStart(started1cross1));
            thread1.Start();
        }

        private int i = 100;
        private Thread thread0;
        private Thread thread1;
        private object str = new object();
        private void startedcross()
        {
            ThreadProcess tp = new ThreadProcess(started);
            tp.BeginInvoke(null, null);
        }

        private void started1cross1()
        {
            ThreadProcess tp1 = new ThreadProcess(started1);
            tp1.BeginInvoke(null, null);
        }
        private void started()
        {
            while (true)
            {
                //string str = "32";
                lock (str)
                {
                    if (i > 0)
                    {
                        textBox1.Text += ((i--).ToString() + "\r\n");
                    }
                }
            }
        }

        private void started1()
        {
            while (true)
            {
                lock (str)
                {
                    if (i > 0)
                    {
                        textBox1.Text += ((i--).ToString() + "\r\n");
                    }
                }
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            xx();
        }

    }
}

 lock 关键字可以用来确保代码块完成运行，而不会被其他线程中断。这是通过在代码块运行期间为给定对象获取互斥锁来实现的。