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

namespace ThreadDemo
{
    public class ThreadDemo
    {
        public Thread thread1 = null;
        public Thread thread2 = null;
        public Thread thread3 = null;
        public Thread thread4 = null;

        public List<int> listInt = null;
        private List<int> listInt2 = null;
        private event EventHandler ehRemoveCompleted;

        public ThreadDemo()
        {
            ehRemoveCompleted += new EventHandler(ThreadDemo_ehRemoveCompleted);
            listInt = new List<int>();
            for (int i = 0; i < 10000; i++)
            {
                listInt.Add(i);
            }

            thread1 = new Thread(Run);
            thread1.Name = "线程1";
            thread2 = new Thread(Run);
            thread2.Name = "线程2";
            thread3 = new Thread(Run);
            thread3.Name = "线程3";
            thread4 = new Thread(Run);
            thread4.Name = "线程4";

            listInt2 = new List<int>();
            for (int j = 0; j < 10000; j++)
            {
                listInt2.Add(j);
            }
        }

        void ThreadDemo_ehRemoveCompleted(object sender, EventArgs e)
        {
            Program.methodWatch.Stop();
            Console.WriteLine(Program.methodWatch.ElapsedTicks + "____________________________________");
            thread1.Abort();
            thread2.Abort();
            thread3.Abort();
            thread4.Abort();
        }

        public void DoWorker()
        {
            thread1.Start();
            thread2.Start();
            thread3.Start();
            thread4.Start();
        }

        void Run()
        {
            while (true)
            {
                Monitor.Enter(this);
                if (listInt.Count > 0)
                {
                    listInt.RemoveAt(0);
                }
                Monitor.Exit(this);

                if (listInt.Count == 0)
                {
                    ehRemoveCompleted(this, new EventArgs());
                }
            }
        }

        public void DoWorker2()
        {
            for (int i = 0; i < listInt2.Count; i++)
            {
                listInt2.Remove(i);
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Diagnostics;

namespace ThreadDemo
{
    class Program
    {
       public static Stopwatch methodWatch = null;

       static void Main(string[] args)
        {
            ThreadDemo t = new ThreadDemo();

            methodWatch = new Stopwatch();//1
            methodWatch.Start();//2
            t.DoWorker();//3

            //先运行上面的 1,2,3 记下结果 然后注释1,2,3 把下面的去掉注释运行
            //Stopwatch expWatch = new Stopwatch();
            //expWatch.Start();
            //t.DoWorker2();
            //expWatch.Stop();
            //Console.WriteLine(expWatch.ElapsedTicks);
    
        }
    }
}