HttpWebRequest用ip代理Timeout和ReadWriteTimeout失效不听话问题

                ManualResetEvent mre = new ManualResetEvent(false);
		var result="";
                mre = new ManualResetEvent(false);
                var t = new Thread(new ThreadStart(delegate() {
                    result=gethtml();//这里是http请求方法
                    mre.Set();
                }));
                t.IsBackground = true;
                t.Start();
                mre.WaitOne(5000);//设置5秒超时

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