C# UDP Socket client and server

Question

My first question here. I am new to this kind of programming, and i\'ve only programmed .NET web sites and forms.

Now, the company I work at, asks me to make an Acti

Answer 1

Simple server and client:

using System;
using System.Text;
using System.Net;
using System.Net.Sockets;

class Program
{
    static void Main(string[] args)
    {
        // Create UDP client
        int receiverPort = 20000;
        UdpClient receiver = new UdpClient(receiverPort);

        // Display some information
        Console.WriteLine("Starting Upd receiving on port: " + receiverPort);
        Console.WriteLine("Press any key to quit.");
        Console.WriteLine("-------------------------------\n");

        // Start async receiving
        receiver.BeginReceive(DataReceived, receiver);

        // Send some test messages
        using (UdpClient sender1 = new UdpClient(19999))
            sender1.Send(Encoding.ASCII.GetBytes("Hi!"), 3, "localhost", receiverPort);
        using (UdpClient sender2 = new UdpClient(20001))
            sender2.Send(Encoding.ASCII.GetBytes("Hi!"), 3, "localhost", receiverPort);

        // Wait for any key to terminate application
        Console.ReadKey();
    }

    private static void DataReceived(IAsyncResult ar)
    {
        UdpClient c = (UdpClient)ar.AsyncState;
        IPEndPoint receivedIpEndPoint = new IPEndPoint(IPAddress.Any, 0);
        Byte[] receivedBytes = c.EndReceive(ar, ref receivedIpEndPoint);

        // Convert data to ASCII and print in console
        string receivedText = ASCIIEncoding.ASCII.GetString(receivedBytes);
        Console.Write(receivedIpEndPoint + ": " + receivedText + Environment.NewLine);

        // Restart listening for udp data packages
        c.BeginReceive(DataReceived, ar.AsyncState);
    }
}