static void Main(string[] args){ //設置線程池中的線程數最大為1000, //第一個為工作者線程，第二個為I/O線程 ThreadPool.SetMaxThreads(1000, 1000); for (int i = 0; i < 10;i ) {  ThreadPool.QueueUserWorkItem(new WaitCallback(ShowMessage), string.Format("當前編號{0}",i)); } Console.ReadLine();}//帶參數 無返回值static void ShowMessage(object x){ string current = string.Format("當前線程id為{0}", System.  Threading.Thread.CurrentThread.ManagedThreadId); //等待1秒鐘 System.Threading.Thread.Sleep(1000); Console.WriteLine(string.Format("{0},輸入為{1}", current, x));}