主线程结束之后，所有的子线程都结束

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;

namespace ConPra
{
    class Program
    {
        //主线程结束之后，所有的子线程都结束
        public static void Main(string[] Args)
        {
            Thread t1;
            Thread t2;
            t1 = new Thread(new ThreadStart(PrintfAllDatasThread1));
            t2 = new Thread(new ThreadStart(PrintfAllDatasThread2));
            t1.IsBackground = true;
            t2.IsBackground = true;
            t1.Start();

            //与下面的代码一样的功能
            //while (t1.ThreadState!=ThreadState.Stopped)
            //{
            //    Thread.Sleep(20);
            //}

            //while (t1.IsAlive)
            //{
            //    Thread.Sleep(20);               
            //}
            t1.Join();//表示当t1线程运行结束之后，主线程才能执行
            Console.WriteLine(t1.ThreadState.ToString() + " " + t1.IsAlive);
            t2.Start();

            while (t2.ThreadState != ThreadState.Stopped)
            {

            }
        }

 

        public static void PrintfAllDatasThread1()
        {
            for (int i = 0; i < 10; i++)
            {

                System.Threading.Thread.Sleep(200);
                Console.Write("当前线程ID=" + Thread.CurrentThread.ManagedThreadId + "  " + i);
            }

        }

        public static void PrintfAllDatasThread2()
        {
            for (int i = 0; i < 100; i++)
            {
                System.Threading.Thread.Sleep(200);
                Console.Write("当前线程ID=" + Thread.CurrentThread.ManagedThreadId + "  " + i);
            }
        }
    }
}