tcp Socket的超时时间默认20多秒，而实际连上不需1秒时间，20多秒是无法接受的。

 

IPEndPoint ipep = new IPEndPoint(ip, port);//IP和端口Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);                ConnectSocketDelegate connect = ConnectSocket;                IAsyncResult asyncResult = connect.BeginInvoke(ipep, sock, null, null);                bool connectSuccess = asyncResult.AsyncWaitHandle.WaitOne(TimeOut, false);                if (!connectSuccess)                {                    MessageBox.Show(string.Format("失败！错误信息：{0}", "连接超时"));                    return false;                }                string exmessage = connect.EndInvoke(asyncResult);                if (!string.IsNullOrEmpty(exmessage))                {                    MessageBox.Show(string.Format("失败！错误信息：{0}", exmessage));                    return false;                }                sock.Send(data);//发送信息                reslen = sock.Receive(response, SocketFlags.None);//接收应答数据包

 

private delegate string ConnectSocketDelegate(IPEndPoint ipep, Socket sock);        private string ConnectSocket(IPEndPoint ipep, Socket sock)        {            string exmessage = "";            try            {                sock.Connect(ipep);            }            catch (System.Exception ex)            {                exmessage = ex.Message;            }            finally            {            }            return exmessage;        }