unity3D TcpListener example

UnityListener

public class UnityListener{	
	public UnityListener(){
		tcpClientConnected = new ManualResetEvent(false);
		server = new TcpListener(IPAddress.Parse("127.0.0.1"),8080);
		server.Start();
		// Set the event to nonsignaled state.
		tcpClientConnected.Reset();
		Debug.Log("Waiting for a connection...");
		server.BeginAcceptTcpClient(
			new AsyncCallback(DoAcceptTcpClientCallback), server);
		// Wait until a connection is made and processed before  
		// continuing.
		//tcpClientConnected.WaitOne();
	}
	public static void DoAcceptTcpClientCallback(IAsyncResult ar) {
		string completeMessage = "";
		ClientData cli = new ClientData();
		// Get the listener that handles the client request.
		TcpListener listener = (TcpListener) ar.AsyncState;
		// End the operation and display the received data on  
		// the console.
		cli.Client = listener.EndAcceptTcpClient(ar);
		NetworkStream stream = cli.Client.GetStream();
		if(stream.CanRead){
			stream.BeginRead(cli.data, 0, cli.data.Length, 
		                 new AsyncCallback(ReadCallBack), 
	                          cli);  
		}
		Debug.Log("Client connected");
		// Signal the calling thread to continue.
		tcpClientConnected.Set();
		listener.BeginAcceptTcpClient(
			new AsyncCallback(DoAcceptTcpClientCallback), listener);
	}
	public static void ReadCallBack(IAsyncResult ar ){
		ClientData cli = (ClientData)ar.AsyncState;
		NetworkStream stream = cli.Client.GetStream();
		int bytesCount = stream.EndRead(ar);
		cli.message = String.Concat(cli.message, Encoding.ASCII.GetString(cli.data, 0, bytesCount));    
		
		// message received may be larger than buffer size so loop through until you have it all.
		if(stream.DataAvailable){
			Debug.Log("data available");
			stream.BeginRead(cli.data, 0, cli.data.Length, 
	                          new AsyncCallback(ReadCallBack), 
	                          stream);  
		}
		// Print out the received message to the console.
		Debug.Log("You received the following message : " +
			cli.message);
	}
}

sorry How to use it