Non blocking Select based server

Server.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.Net.Sockets;
using System.IO;

namespace HttpConcurrentServer
{
    class Server
    {

        List<Socket> serverSockets;
        List<Socket> clientSockets;

        public Server(int port)
        {
            Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            server.Blocking = false;

            IPEndPoint serverAddress = new IPEndPoint(IPAddress.Any, port);

            server.Bind(serverAddress);
            server.Listen(10);

            serverSockets = new List<Socket>();
            serverSockets.Add(server);

            clientSockets = new List<Socket>();
        }

        public void Run()
        {
            byte[] data = new byte[8192];

            while (true)
            {
                List<Socket> readingSockets = new List<Socket>(serverSockets);
                readingSockets.AddRange(clientSockets);
                List<Socket> writingSockets = new List<Socket>();
                List<Socket> errorSockets = new List<Socket>();

                Console.WriteLine(readingSockets.Count);

                // Reactor pattern c10k
                Socket.Select(readingSockets, writingSockets, errorSockets, -1);

                Console.WriteLine(readingSockets.Count);

                foreach (Socket readSocket in readingSockets)
                {
                    // is it a server socket?
                    if (serverSockets.Contains(readSocket))
                    {

                        Socket newClient = readSocket.Accept();
                        newClient.Blocking = false;
                        clientSockets.Add(newClient);
                        continue;
                    }

                    // is it a client socket?
                    if (clientSockets.Contains(readSocket))
                    {
                        int dataLength = readSocket.Receive(data);
                        if (dataLength <= 0)
                        {
                            readSocket.Close();
                            clientSockets.Remove(readSocket);
                            continue;
                        }

                        string httpData = Encoding.ASCII.GetString(data, 0, dataLength);
                        Console.WriteLine(httpData);
                    }
                }
            }
        }
    }
}