限制线程的执行个数

限制只有三个线程能够执行

using System;
using System.Threading;

namespace LimitThread
{
    class Program
    {
        static Semaphore semahoro=new Semaphore(3,3);
        public static void Main(string[] args)
        {
            for (int i=0;i<10 ;i++ ) {
                new Thread(Work).Start();
            }
            Console.Write("Press any key to continue . . . ");
            Console.ReadKey(true);
        }
        static void Work()
        {
            while(true)
            {
                semahoro.WaitOne();
                Console.WriteLine("11111");
                Thread.Sleep(1000);
                semahoro.Release();
            }
        }
    }
}