多线程与线程池的介绍看这里
http://edobnet.cnblogs.com/archive/2005/11/29/287094.html

        //private int threadNum = 0;
        //private AutoResetEvent myResetEvent = new AutoResetEvent(false);
        /// <summary>
        /// 线程记数器
        /// </summary>
        private int number = 0;

        /// <summary>
        /// 线程池执行
        /// </summary>
        public void Execute()
        {
            int maxCount = int.Parse(ConfigurationSettings.AppSettings["Count"]);
            int time = int.Parse(ConfigurationSettings.AppSettings["Time"]);
            foreach (TG_EvaluteBaseDatasSet service in this)
            {
                
                
                //                System.Threading.ThreadStart ts = new System.Threading.ThreadStart(service.GetXMLResult);
                //                System.Threading.Thread th = new System.Threading.Thread(ts);
                //                th.Start();
                WaitCallback async = new WaitCallback(FExeute);

                while(true)
                {
                    
                    Monitor.Enter(number);
                    if(number>maxCount)
                        Thread.Sleep(time);
                    else
                        break;
                    Monitor.Exit(number);
                }
                if(ThreadPool.QueueUserWorkItem(async,service))
                    Interlocked.Increment(ref number);
            }
            while(true)
            {
                //myResetEvent.Set();
                Monitor.Enter(number);
                if( number <= 0)
                    break;
                else
                    Thread.Sleep(time);
                Monitor.Exit(number);
            }
            OnTgFinishReport(new EventArgs());

        }
        /// <summary>
        /// 线程执行一个计算
        /// </summary>
        /// <param name="Param">执行对象<see cref="GleNet.HG.HTResolver.TG_EvaluteBaseDatasSet">TG_EvaluteBaseDatasSet</see></param>
        public  void FExeute(object Param)
        {
            //myResetEvent.WaitOne();
            using(TG_EvaluteBaseDatasSet service = (TG_EvaluteBaseDatasSet)Param)
            {
                service.doResult();
                writeFile(Path,service)    ;
                OnTgReport(new ReportEvent(service.TE_PASS_RANGE,service.TE_YEAR,service.TE_MONTH,int.Parse(service.TE_I_E_FLAG),int.Parse(service.TE_ENTRY_TYPE),number));
            }
            Interlocked.Decrement(ref number);
            Console.WriteLine("LEFT:"+number);
            
        }

由程序控制线程数量,并且, 由MONITOR进行保护!