Something

//AJ: Shared assembly
using System;
using System.Collections.Generic;
using System.Text;

namespace Shared
{
    public interface IServerClass
    {
        void SendText(string text);
    }
}

//AJ: Client Console
using System;
using System.Collections.Generic;
using System.Text;

namespace Client
{
    class Program
    {
        static void Main(string[] args)
        {
            System.Runtime.Remoting.Channels.Tcp.TcpClientChannel clientChan = new System.Runtime.Remoting.Channels.Tcp.TcpClientChannel();
            System.Runtime.Remoting.Channels.ChannelServices.RegisterChannel(clientChan, true);
            Shared.IServerClass serverClass = (Shared.IServerClass)Activator.GetObject(typeof(Shared.IServerClass), "tcp://localhost:9999/ServerClass.rem");

            while (true)
            {
                string input = Console.ReadLine();

                if (input.ToLower() == "exit")
                    break;

                serverClass.SendText(input);
            }
        }
    }
}

//AJ: Server Console
using System;
using System.Collections.Generic;
using System.Text;


namespace Server
{
    class Program
    {
        static void Main(string[] args)
        {
            System.Runtime.Remoting.Channels.Tcp.TcpServerChannel serverChan = new System.Runtime.Remoting.Channels.Tcp.TcpServerChannel(9999);
            System.Runtime.Remoting.Channels.ChannelServices.RegisterChannel(serverChan, true);
            System.Runtime.Remoting.RemotingConfiguration.RegisterWellKnownServiceType(new System.Runtime.Remoting.WellKnownServiceTypeEntry(typeof(ServerClass), "ServerClass.rem", System.Runtime.Remoting.WellKnownObjectMode.SingleCall));

            Console.ReadLine();
        }
    }

    public class ServerClass : MarshalByRefObject, Shared.IServerClass
    {
        public void SendText(string text)
        {
            Console.WriteLine(text);
        }
    }
}