Socket in C# continuous

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C#

network

sockets

I have two clients (A, B) and 1 Server (C).How do A or B continuously connected to C.When the first request to the server, no need to connect to that still ongoing and communicate with Server.C order to understand what is A or B will respond and client connection is terminated when the client closes the connection and server is still running normally.

using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Collections;
using System.Windows.Forms;
namespace example
{
// Server A
    class ExampleS
    {
        private IPEndPoint _ipEndPoint;
        private Socket _socket;
        private Socket _aSocket;
        private NetworkStream _network;
        private StreamReader _streamReader;
        private StreamWriter _streamWriter;
        void StartServer()
        {
            _ipEndPoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 2009);
            _socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            _socket.Bind(_ipEndPoint);
            _socket.Listen(1000000000);

            while (true)
            {
                _aSocket = _socket.Accept();
                _network = new NetworkStream(_aSocket);
                _streamReader = new StreamReader(_network);
                _streamWriter = new StreamWriter(_network);
                if (_socket.Connected) continue;
                string _messenger = _streamReader.ReadLine();
                if (_messenger.Equals("X1"))
                {
                    _streamWriter.WriteLine("Hello");
                    _streamWriter.Flush();
                }
                else
                {
                    _streamWriter.WriteLine("Goodbye");
                    _streamWriter.Flush();
                }
            }
        }
    }

// Client B
    class ExampleCB
    {
        private IPEndPoint _ipEndPoint;
        private Socket _socket;
        private NetworkStream _network;
        private StreamWriter _streamWriter;
        private StreamReader _streamReader;
        void StartClient()
        {
            _ipEndPoint = new IPEndPoint(Dns.Resolve(Dns.GetHostName()).AddressList[0],2009);
            _socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            _socket.Connect(_ipEndPoint);
            if (!_socket.Connected)
            {
                 return;
            }
            _network = new NetworkStream(_socket);
            _streamWriter = new StreamWriter(_network);
            _streamReader = new StreamReader(_network);
            _streamWriter.WriteLine("X1");

            _streamWriter.Flush();
            var readLine = _streamReader.ReadLine();
            if (readLine == null)
            {
                MessageBox.Show("Error messenger");
                return;
            }
            else
            {
                MessageBox.Show(readLine.ToString());
            }
            _streamWriter.Close();
            _streamReader.Close();
            _network.Close();
        }
    }
// Client C
 class ExampleCC
    {
        private IPEndPoint _ipEndPoint;
        private Socket _socket;
        private NetworkStream _network;
        private StreamWriter _streamWriter;
        private StreamReader _streamReader;
        void StartClient()
        {
            _ipEndPoint = new IPEndPoint(Dns.Resolve(Dns.GetHostName()).AddressList[0], 2009);
            _socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            _socket.Connect(_ipEndPoint);
            if (!_socket.Connected)
            {
                 return;
            }
            _network = new NetworkStream(_socket);
            _streamWriter = new StreamWriter(_network);
            _streamReader = new StreamReader(_network);
            _streamWriter.WriteLine("X1");

            _streamWriter.Flush();
            var readLine = _streamReader.ReadLine();
            if (readLine == null)
            {
                MessageBox.Show("Error messenger");
                return;
            }
            else
            {
                MessageBox.Show(readLine.ToString());
            }
            _streamWriter.Close();
            _streamReader.Close();
            _network.Close();
        }
    }
}

Every time a request to the server, I have to reconnect.Now how without creating connections that retains the session with the server and the server responds to the correct client is sending requests.
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