Sending a value from server to client with sockets

Question

I am using the following projects in order to create an asynchronous communication between server and client sockets. When I am running those projects I am sending a message

Answer 1

Why don't you make your life easier and use SignalR?
Below you can see a simple example where the server and the clients are console apps

Client (Run this .exe many times)

using System;
using Microsoft.AspNet.SignalR.Client;

namespace SignalRClient
{
    class Program
    {
        private static IHubProxy HubProxy { get; set; }
        const string ServerURI = "http://localhost:1234/signalr";
        private static HubConnection Connection { get; set; }

        static void Main(string[] args)
        {
            Connection = new HubConnection(ServerURI);
            HubProxy = Connection.CreateHubProxy("MyHub");

            HubProxy.On("SendMessage", (name, message) => Console.WriteLine(name + ":" + message));
            Connection.Start().Wait();

            Console.WriteLine("Press Enter to stop client");
            Console.ReadLine();
        }
    }
}

Server (Run this .exe before you run the clients)

using System;
using System.Threading.Tasks;
using Microsoft.AspNet.SignalR;
using Microsoft.AspNet.SignalR.Client;
using Microsoft.Owin.Hosting;
using Owin;

namespace SignalRServer
{
    class Program
    {
        static private IDisposable SignalR { get; set; }
        const string ServerURI = "http://localhost:1234";
        private static IHubProxy HubProxy { get; set; }
        private static HubConnection Connection { get; set; }
        static void Main(string[] args)
        {
            SignalR = WebApp.Start(ServerURI);
            Console.WriteLine("Server running at " + ServerURI);

            Connection = new HubConnection(ServerURI);
            HubProxy = Connection.CreateHubProxy("MyHub");
            HubProxy.On("SendMessage", (name, message) => Console.WriteLine(name + ":" + message));
            Connection.Start().Wait();

            string messageToSentToClients;
            do
            {
                Console.WriteLine("Type someting to send to clients and press enter");
                messageToSentToClients = Console.ReadLine();
               HubProxy.Invoke("Send", "Server", messageToSentToClients);
           } while (messageToSentToClients != "exit");

       }
    }

    public class MyHub : Hub
    {
        public void Send(string name, string message) { Clients.All.sendMessage(name, message); }
    }

    class Startup
    {
        public void Configuration(IAppBuilder app) { app.MapSignalR(); }
    }
}

In order for the above to work you need the following NuGet packages:

Client:
Microsoft.AspNet.SignalR.Client
Server
Microsoft.AspNet.SignalR
Microsoft.AspNet.SignalR.Client
Microsoft.AspNet.SignalR.SelfHost
Microsoft.Owin.Host.HttpListener

If you want the server/clients to be on different machines all you have to do is change the ServeURI properties in both projects:

//Clients
const string ServerURI = "http://SERVER_IP:PORT/signalr";
//Server
const string ServerURI = "http://SERVER_IP:PORT"; 

You can find another similar example in WinForms here:
https://code.msdn.microsoft.com/windowsdesktop/Using-SignalR-in-WinForms-f1ec847b