init csharp server

server/src/UdpServer.cs

@@ -0,0 +1,63 @@
+using System.Net;
+using System.Net.Sockets;
+using System.Text;
+
+public class UDPServer
+{
+    private int listenPort;
+    private UdpClient listener;
+    private IPEndPoint groupEP;
+    private Thread thrd;
+    private bool isRunning;
+
+
+
+    public UDPServer(int port)
+    {
+        // Construction
+        listenPort = port;
+        listener = new UdpClient(listenPort);
+        groupEP = new IPEndPoint(IPAddress.Any, listenPort);
+
+        // New Thread
+        var thrdStart = new ThreadStart(ReceiveHandler);
+        thrd = new Thread(thrdStart);
+    }
+
+    private void ReceiveHandler()
+    {
+        try
+        {
+            while (isRunning)
+            {
+                byte[] bytes = listener.Receive(ref groupEP);
+
+                Console.WriteLine($"Received broadcast from {groupEP} :");
+                Console.WriteLine($" {Encoding.ASCII.GetString(bytes, 0, bytes.Length)}");
+            }
+        }
+        catch (SocketException e)
+        {
+            Console.WriteLine(e);
+        }
+        finally
+        {
+            listener.Close();
+        }
+    }
+
+    public void Start()
+    {
+        isRunning = true;
+        thrd.Start();
+    }
+
+    public void Stop()
+    {
+        isRunning = false;
+        thrd.Join();
+    }
+
+
+}
+