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？
虽然能连接，但Ｃ＃客户端这边太占CPU了
PHP代码如下：

PHP code

$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