System Net Sockets C# by API

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
class MainClass
{
   public static void Main()
   {
      IPEndPoint ip = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 9999);
      Socket server = new Socket(AddressFamily.InterNetwork,SocketType.Stream, ProtocolType.Tcp);
      try
      {
         server.Connect(ip);
      } catch (SocketException e){
         Console.WriteLine("Unable to connect to server.");
         return;
      }
      byte[] data = new byte[1024];
      int receivedDataLength = server.Receive(data);
      string stringData = Encoding.ASCII.GetString(data, 0, receivedDataLength);
      Console.WriteLine(stringData);
      server.Shutdown(SocketShutdown.Both);
      server.Close();
   }
}