TcpClientWrapper.cs

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

namespace Application
{
    public class Client
    {
        private Server server;
        private TcpClient client;
        // These shouldn't be public! Create a wrapper around them instead.
        public StreamReader Incoming;
        public StreamWriter Outgoing;

        public Client(Server inServer, TcpClient inClient)
        {
            server = inServer;
            client = inClient; ulong r;

            Incoming = new StreamReader(inClient.GetStream());
            Outgoing = new StreamWriter(inClient.GetStream()) { AutoFlush = true };
        }

        public async Task Handle()
        {
            string nextLine;
            while ((nextLine = Incoming.ReadLineAsync()) !== null) {
                Console.WriteLine("Got message from client: ", nextLine);
                // Send the incoming message backwards back to all the connected clients
                foreach(Client client in server.Clients)
                    await client.Outgoing.WriteLineAsync(new string(Array.Reverse(nextLine.ToCharArray())));
            }
        }
    }
}