详解C#如何为某个方法设定执行超时时间

publicdelegatevoid DoHandler();
    publicclass Timeout
    {
        private ManualResetEvent mTimeoutObject;
        //标记变量
privatebool mBoTimeout;
        public DoHandler Do;
        public Timeout()
        {
            //  初始状态为 停止
this.mTimeoutObject =new ManualResetEvent(true);
        }
        ///<summary>
        /// 指定超时时间 异步执行某个方法
        ///</summary>
        ///<returns>执行 是否超时</returns>
publicbool DoWithTimeout(TimeSpan timeSpan)
        {
            if (this.Do ==null)
            {
                returnfalse;
            }
            this.mTimeoutObject.Reset();
            this.mBoTimeout =true; //标记
this.Do.BeginInvoke(DoAsyncCallBack, null);
            // 等待 信号Set
if (!this.mTimeoutObject.WaitOne(timeSpan, false))
            {
                this.mBoTimeout =true;
            }
            returnthis.mBoTimeout;
        }
        ///<summary>
        /// 异步委托 回调函数
        ///</summary>
        ///<param name="result"></param>
privatevoid DoAsyncCallBack(IAsyncResult result)
        {
            try
            {
                this.Do.EndInvoke(result);
                // 指示方法的执行未超时
this.mBoTimeout =false; 
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                this.mBoTimeout =true;
            }
            finally
            {
                this.mTimeoutObject.Set();
            }
        }
    }

class Program
    {
        privatestatic Stopwatch watch;
        privatestatic System.Threading.Timer timer;
        [STAThread]
        staticvoid Main(string[] args)
        {
            watch =new Stopwatch();
            Timeout timeout =new Timeout();
            timeout.Do =new Program().DoSomething;
            watch.Start();
            timer =new System.Threading.Timer(timerCallBack, null, 0, 500);
            Console.WriteLine("4秒超时开始执行");
            bool bo = timeout.DoWithTimeout(new TimeSpan(0, 0, 0, 4));
            Console.WriteLine(string.Format("4秒超时执行结果,是否超时：{0}", bo));
            Console.WriteLine("***************************************************");
            timeout =new Timeout();
            timeout.Do =new Program().DoSomething;
            Console.WriteLine("6秒超时开始执行");
            bo = timeout.DoWithTimeout(new TimeSpan(0, 0, 0, 6));
            Console.WriteLine(string.Format("6秒超时执行结果,是否超时：{0}", bo));
            timerCallBack(null);
            watch.Stop();
            timer.Dispose();
            Console.ReadLine();
        }
        staticvoid timerCallBack(object obj)
        {
            Console.WriteLine(string.Format("运行时间:{0}秒", watch.Elapsed.TotalSeconds.ToString("F2")));
        }
        publicvoid DoSomething()
        {
            // 休眠 5秒
            System.Threading.Thread.Sleep(new TimeSpan(0, 0, 0, 5));
        }
    }