sockets c#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.Net.Sockets;

namespace ClientServer_080423 {
    class Program {
        static void Main(string[] args) {

            try {
                Console.WriteLine("Enter 1 to launch the client, else server");
                if (Console.ReadLine() == "1") {
                    IPEndPoint ipe = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 5834);
                    Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                    socket.Connect(ipe);
                    string message = "";
                    do {
                        Console.WriteLine("Enter your message(0 to exit):");
                        message = Console.ReadLine();
                        byte[] data = Encoding.Unicode.GetBytes(message);
                        socket.Send(data);

                        StringBuilder builder = new StringBuilder();
                        int bytes = 0; // количество полученных байт
                        do {
                            bytes = socket.Receive(data, data.Length, 0);
                            builder.Append(Encoding.Unicode.GetString(data, 0, bytes));
                        }
                        while (socket.Available > 0);
                        Console.WriteLine("Ответ сервера: " + builder.ToString());

                    } while (message != "0");

                    socket.Shutdown(SocketShutdown.Both);
                    socket.Close();
                } else {

                    IPEndPoint ipe = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 5834);
                    Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                    socket.Bind(ipe);
                    socket.Listen(5834);

                    Socket handler = socket.Accept();

                    while (true) {
                        // получаем ответ
                        byte[] data = new byte[256]; // буфер для ответа
                        int recieved = handler.Receive(data, SocketFlags.None);
                        string response = Encoding.Unicode.GetString(data, 0, recieved);
                        Console.WriteLine("{0}: {1}", ((IPEndPoint)(handler.RemoteEndPoint)).Port.ToString(), response);
                        handler.Send(Encoding.Unicode.GetBytes("Answer recieved: " +Encoding.Unicode.GetString(data, 0, recieved)));
                    }

                    socket.Shutdown(SocketShutdown.Both);
                    socket.Close();
                }

            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
            Console.ReadKey();
}
    }
}