PHP作为客户端用套接字去连接C#的某个端口，只连接不发数据，需不需制订协议？

Question

虽然能连接，但Ｃ＃客户端这边太占CPU了
PHP代码如下：$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
$connection = socket_connect($socket, $IP, 2012); C#代码如下：
namespace abcde
{
    class abcSocket
    {
        public static StateObject state;
        public IPAddress ipAddress;
        public IPEndPoint localEndPoint;
        public Socket serverSocket;
        public static String receive;
        public static String receive1;
        public static int back;
        public  void ListenFlow()
        {
            ipAddress = IPAddress.Parse("0.0.0.0");
            localEndPoint = new IPEndPoint(ipAddress,2000);
            this.serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            serverSocket.Bind(localEndPoint);
            serverSocket.Listen(100);
            serverSocket.BeginAccept(new AsyncCallback(AcceptCallback), serverSocket); 
        }
        public void AcceptCallback(IAsyncResult ar)
        {
            try
            {
                Socket serverSocket = (Socket)ar.AsyncState;
                Socket clientSocket = serverSocket.EndAccept(ar);
                state = new StateObject();
                state.workSocket = clientSocket;
                this.serverSocket.BeginAccept(new AsyncCallback(AcceptCallback), this.serverSocket);
                clientSocket.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReadCallback), state);
            }
            catch (Exception e)
            {
                MessageBox.Show(e.ToString());
            }
        }
        public  void ReadCallback(IAsyncResult ar)
        {
            try
            {
                StateObject state = (StateObject)ar.AsyncState;
                Socket clientSocket = state.workSocket;//从异步状态对象中获得State对象和客户套接字
                int bytesRead = clientSocket.EndReceive(ar);//从客户套接字读取数据
                if (bytesRead > 0)
                {
                   byte[] str = state.buffer;
                   back=Convert.ToInt32(str[0]);
                   receive = System.Text.Encoding.UTF8.GetString(str);
                }
                Thread.Sleep(1);
                try { clientSocket.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReadCallback), state); }
                catch (Exception e) { MessageBox.Show("因网络不稳定，已中断一个已有的链接"); }
                byte[] str1 = state.buffer;
               abcde.abcSocket.receive1 = Convert.ToString(str1[0]);
            }
            catch (Exception e)
            {
                MessageBox.Show(e.ToString());
            }
        }
        public static  void Send(String data)
        {
            byte[] byteData = Encoding.UTF8.GetBytes(data);
            state.workSocket.BeginSend(byteData, 0, byteData.Length, 0, new AsyncCallback(SendCallback), state.workSocket);
        }
        private  static void SendCallback(IAsyncResult ar)
        {
            try
            {
                Socket clientSocket = (Socket)ar.AsyncState;
                int bytesSent = clientSocket.EndSend(ar);//完成发送
            }
            catch (Exception e)
            {
                MessageBox.Show(e.ToString());
            }
        }
    }
    public class StateObject
    {
        public Socket workSocket = null;
        public const int BufferSize = 1024;
        public byte[] buffer = new byte[BufferSize];
    }
}
[/code]
因为在其他地方要和C#相互收发数据，所以中间接收和发送的函数不能少，那么只是接受连接的话，该怎么处理呢？