using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
 
class Server {
    static void Main() {
        TcpListener server = new TcpListener(IPAddress.Any, 13000);
        server.Start();
        Console.WriteLine("Server started...");
 
        while (true) {
            TcpClient client = server.AcceptTcpClient();
            NetworkStream stream = client.GetStream();
            byte[] buffer = new byte[client.ReceiveBufferSize];
            int bytesRead = stream.Read(buffer, 0, buffer.Length);
            string message = Encoding.ASCII.GetString(buffer, 0, bytesRead);
            Console.WriteLine("Received: " + message);
 
            byte[] response = Encoding.ASCII.GetBytes("Message received");
            stream.Write(response, 0, response.Length);
            client.Close();
        }
    }
}

using System;
using System.Net.Sockets;
using System.Text;
 
class Client {
    static void Main() {
        TcpClient client = new TcpClient("localhost", 13000);
        NetworkStream stream = client.GetStream();
        byte[] message = Encoding.ASCII.GetBytes("Hello, Server!");
        stream.Write(message, 0, message.Length);
 
        byte[] buffer = new byte[client.ReceiveBufferSize];
        int bytesRead = stream.Read(buffer, 0, buffer.Length);
        string response = Encoding.ASCII.GetString(buffer, 0, bytesRead);
        Console.WriteLine("Received: " + response);
 
        client.Close();
    }
}

using System;
using System.Net;
using System.Net.Sockets;
 
class BinaryServer {
    static void Main() {
        TcpListener server = new TcpListener(IPAddress.Any, 13000);
        server.Start();
        Console.WriteLine("Server started...");
 
        while (true) {
            TcpClient client = server.AcceptTcpClient();
            NetworkStream stream = client.GetStream();
            byte[] buffer = new byte[client.ReceiveBufferSize];
            int bytesRead = stream.Read(buffer, 0, buffer.Length);
 
            // پردازش داده‌های باینری
            Console.WriteLine("Received " + bytesRead + " bytes");
 
            byte[] response = BitConverter.GetBytes(bytesRead);
            stream.Write(response, 0, response.Length);
            client.Close();
        }
    }
}

using System;
using System.Net.Sockets;
 
class BinaryClient {
    static void Main() {
        TcpClient client = new TcpClient("localhost", 13000);
        NetworkStream stream = client.GetStream();
        byte[] data = new byte[] { 0, 1, 2, 3, 4, 5 };
        stream.Write(data, 0, data.Length);
 
        byte[] buffer = new byte[client.ReceiveBufferSize];
        int bytesRead = stream.Read(buffer, 0, buffer.Length);
        int receivedBytes = BitConverter.ToInt32(buffer, 0);
        Console.WriteLine("Received: " + receivedBytes + " bytes");
 
        client.Close();
    }
}

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
 
class UdpServer {
    static void Main() {
        UdpClient server = new UdpClient(13000);
        IPEndPoint clientEndpoint = new IPEndPoint(IPAddress.Any, 0);
        Console.WriteLine("UDP Server started...");
 
        while (true) {
            byte[] buffer = server.Receive(ref clientEndpoint);
            string message = Encoding.ASCII.GetString(buffer);
            Console.WriteLine("Received: " + message);
 
            byte[] response = Encoding.ASCII.GetBytes("Message received");
            server.Send(response, response.Length, clientEndpoint);
        }
    }
}

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
 
class UdpClientProgram {
    static void Main() {
        UdpClient client = new UdpClient();
        byte[] message = Encoding.ASCII.GetBytes("Hello, UDP Server!");
        client.Send(message, message.Length, "localhost", 13000);
 
        IPEndPoint serverEndpoint = new IPEndPoint(IPAddress.Any, 0);
        byte[] buffer = client.Receive(ref serverEndpoint);
        string response = Encoding.ASCII.GetString(buffer);
        Console.WriteLine("Received: " + response);
 
        client.Close();
    }
}

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
 
class MultiThreadedServer {
    static void Main() {
        TcpListener server = new TcpListener(IPAddress.Any, 13000);
        server.Start();
        Console.WriteLine("Server started...");
 
        while (true) {
            TcpClient client = server.AcceptTcpClient();
            Thread clientThread = new Thread(HandleClient);
            clientThread.Start(client);
        }
    }
 
    static void HandleClient(object obj) {
        TcpClient client = (TcpClient)obj;
        NetworkStream stream = client.GetStream();
        byte[] buffer = new byte[client.ReceiveBufferSize];
        int bytesRead = stream.Read(buffer, 0, buffer.Length);
        string message = Encoding.ASCII.GetString(buffer, 0, bytesRead);
        Console.WriteLine("Received: " + message);
 
        byte[] response = Encoding.ASCII.GetBytes("Message received");
        stream.Write(response, 0, response.Length);
        client.Close();
    }
}