c# socket programming client/server

//server socket Code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.IO;
using System.Data.OleDb;

namespace Server
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("The Server is Run And Wait .....");

            // Create Server Socket to recive
            TcpListener Ls = new TcpListener(7110);
            Ls.Start();

            //blocks until a client has connected to the server
            while (true)  // to make the server always on
            {
                // to connect with clients
                TcpClient client = Ls.AcceptTcpClient();
                NetworkStream clientStream = client.GetStream();
                byte[] message = new byte[4096];
                clientStream.Read(message, 0, message.Length);


                /////////////////////////////////////////////////

                string src = Encoding.ASCII.GetString(message, 0, message.Length);
                 
                
                
                OleDbConnection cnn = new OleDbConnection();
                cnn.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=E:\\c++\\database.accdb";
                cnn.Open();

                OleDbDataAdapter adb = new OleDbDataAdapter("Select sip From Table1 Where Site='"+src.Trim('\0')+"'",cnn);
                System.Data.DataSet dat = new System.Data.DataSet();
                adb.Fill(dat);
                string Msgout = dat.Tables[0].Rows[0].ItemArray[0].ToString();

                //////////////////////////////////////////////////

                NetworkStream ServerStream = client.GetStream();
                byte[] buffer = Encoding.ASCII.GetBytes(Msgout);
                ServerStream.Write(buffer, 0, buffer.Length);

                ServerStream.Flush();
                client.Close();
 
            }
            Ls.Stop();

            

        }
    }
}

//Client Socket Code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net.Sockets;
using System.IO;

namespace php1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {
            
            
              
        }

        private void button1_Click(object sender, EventArgs e)
        {

            // creat client Socket  to send
            TcpClient Sending = new TcpClient("localhost",7110);
            byte[] data =Encoding.ASCII.GetBytes(textBox1.Text);
            NetworkStream datastream = Sending.GetStream();
            datastream.Write(data, 0, data.Length);


            data = new byte[256];
            datastream.Read(data,0,data.Length);
            string ResponseData;
            ResponseData = Encoding.ASCII.GetString(data, 0, data.Length);



            textBox2.Text = textBox2.Text + Environment.NewLine + ResponseData;
            textBox1.Text = "";
            Sending.Close();


           
        

        }

        private void button2_Click(object sender, EventArgs e)
        {
            //this.Close();
            Application.Exit();
        }
    }
}