.NET (Core and Framework)

using System;<br />
using System.Collections.Generic;<br />
using System.ComponentModel;<br />
using System.Data;<br />
using System.Drawing;<br />
using System.Text;<br />
using System.Windows.Forms;<br />
using System.Runtime.Remoting;<br />
using System.Runtime.Remoting.Channels;<br />
using System.Runtime.Remoting.Channels.Tcp;<br />
<br />
namespace WindowsApplication2<br />
{<br />
    public partial class Form1 : Form<br />
    {<br />
        public Form1()<br />
        {<br />
            InitializeComponent();<br />
        }<br />
<br />
        private void Form1_Load(object sender, EventArgs e)<br />
        {<br />
            // Create an instance of a channel<br />
            TcpChannel channel = new TcpChannel(8080);<br />
            ChannelServices.RegisterChannel(channel);<br />
<br />
            // Register as an available service with the name HelloWorld<br />
            RemotingConfiguration.RegisterWellKnownServiceType(<br />
                typeof(ClassLibrary1.Class1),<br />
                "HelloWorld",<br />
                WellKnownObjectMode.SingleCall);<br />
        }<br />
    }<br />
}

      // Create an instance of a channel<br />
            TcpChannel channel = new TcpChannel(8080);<br />
            ChannelServices.RegisterChannel(channel);<br />
<br />
            // Register as an available service with the name HelloWorld<br />
            RemotingConfiguration.RegisterWellKnownServiceType(<br />
                typeof(ClassLibrary1.Class1),<br />
                "HelloWorld",<br />
                WellKnownObjectMode.SingleCall);

TcpChannel chan = new TcpChannel();<br />
            ChannelServices.RegisterChannel(chan);<br />
<br />
            // Create an instance of the remote object<br />
            ClassLibrary1.Class1 obj = (ClassLibrary1.Class1)Activator.GetObject(<br />
                typeof(ClassLibrary1.Class1),<br />
                "tcp://172.17.168.51:8080/HelloWorld");<br />
            <br />
            try<br />
            {<br />
                if (obj.Equals(null))<br />
                {<br />
                    label1.Text = "not connected";<br />
                }<br />
                else<br />
                {<br />
                    label1.Text = "connected";<br />
                }<br />
            }<br />
            catch<br />
            {<br />
                label1.Text = "not connected";<br />
            }

public class Class1 : MarshalByRefObject<br />
    {<br />
<br />
        public Class1()<br />
        {<br />
             string abc;  <br />
        }<br />
<br />
<br />
<br />
        /// <summary><br />
        /// Return a hello message<br />
        /// </summary><br />
        /// <returns>Hello world message</returns><br />
        <br />
    }