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Udp connection test

using System; using System.Text; using System.Net; using System.Net.Sockets; using System.Threading; class MainClass {     private static void Main()      {         string IP = "127.0.0.1";         int port = 9999;         IPEndPoint remoteEndPoint =  new IPEndPoint(IPAddress.Parse(IP), port);         Thread receiveThread = new Thread(ReceiveData);         receiveThread.IsBackground = true;         receiveThread.Start();         UdpClient client = new UdpClient();         try         {             string text;             do             {                 text = Console.ReadLine();                 if (text.Length != 0)                 {                     byte[] data = Encoding.UTF8.GetBytes(text);                     client.Send(data, data.Length, remoteEndPoint);                 }             } while (text.Length != 0);         }         catch (Exception err)         {             Console.WriteLine(err.ToString());         }         finally         {             client.Close();         }     }     private static void ReceiveData()      {         UdpClient client = new UdpClient(999);         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());             }         }     } }