Csharp/CSharp Tutorial/Network/Udp

new UdpClient(eceive

using System;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.Threading;
class MainClass {
    private static void Main() {
        IPEndPoint remoteEndPoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 8888);
        Thread receiveThread = new Thread(ReceiveData);
        receiveThread.IsBackground = true;
        receiveThread.Start();
        UdpClient client = new UdpClient();
        try {
            string text = "message";
            byte[] data = Encoding.UTF8.GetBytes(text);
            client.Send(data, data.Length, remoteEndPoint);
        } catch (Exception err) {
            Console.WriteLine(err.ToString());
        } finally {
            client.Close();
        }
    }
    private static void ReceiveData() {
        UdpClient client = new UdpClient(5555);
        while (true) {
            try {
                IPEndPoint anyIP = new IPEndPoint(IPAddress.Any, 0);
                byte[] data = client.Receive(ref anyIP);
                string text = Encoding.UTF8.GetString(data);
                Console.WriteLine(">> " + text);
            } catch (Exception err) {
                Console.WriteLine(err.ToString());
            }
        }
    }
}

UDP multi-cast

using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.IO;
using System.IO.rupression;
using System.Net;
using System.Net.Mail;
using System.Net.Sockets;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Xml;
public class MainClass
{
    public static void Main()
    {
        using (UdpClient udp = new UdpClient(1024))
        {
            IPAddress groupAddress = IPAddress.Parse("0.0.0.0");
            udp.JoinMulticastGroup(groupAddress, 32);
            udp.EnableBroadcast = true;
            IPEndPoint sentBy = null;
            byte[] data = udp.Receive(ref sentBy);
            udp.DropMulticastGroup(groupAddress);
        }
    }
}

Udp time out option

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
class MainClass
{
   public static void Main()
   {
      byte[] data = new byte[1024];
      string input, stringData;
      int receivedDataLength;
      IPEndPoint ip = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 9999);
      Socket server = new Socket(AddressFamily.InterNetwork,SocketType.Dgram, ProtocolType.Udp);
      int sockopt = (int)server.GetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout);
      Console.WriteLine("Default timeout: {0}", sockopt);
      server.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, 3000);
      sockopt = (int)server.GetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout);
      Console.WriteLine("New timeout: {0}", sockopt);
      server.Close();
   }
}