Try to bind 3337

Program.cs

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

namespace Test3337
{
	class Program
	{
		static void Main()
		{
			try
			{
				Console.WriteLine("Creating socket...");
				using (var sock = new Socket(SocketType.Stream, ProtocolType.IP))
				{
					Console.WriteLine("Binding to 0.0.0.0:3337...");
					sock.Bind(new IPEndPoint(IPAddress.Any, 3337));
					
					Console.WriteLine("Bound! Beginning listen...");

					sock.Listen(10);

					Console.WriteLine("Listening! Waiting to accept...");

					using (var con = sock.Accept())
					{
						Console.WriteLine("Accepted! I am connected to " + con.RemoteEndPoint.Address + " on port number " + ((IPEndPoint)con.RemoteEndPoint).Port);
						Console.WriteLine("Shutting down connection socket...");
						con.Shutdown(SocketShutdown.Both);
						Console.WriteLine("Disposing connection socket...");
					}
					Console.WriteLine("Shutting down listen socket...");
					sock.Shutdown(SocketShutdown.Both);
					Console.WriteLine("Disposing listen socket...");
				}
			}
			catch (Exception e)
			{
				Console.WriteLine(e.ToString());
			}
			Console.WriteLine("Press any key to continue...");
			Console.ReadKey();
		}
	}
}