C#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using REWFComm;

namespace Client
{
    public partial class Main : Form
    {
        delegate void RTBUpdateDelegate(string strMess);
        object formobj;

        public Main()
        {
            InitializeComponent();
            formobj = this.rtb_in;
        }
              
        private void btn_send_Click(object sender, EventArgs e)
        {
            ICommon obj = (ICommon)Activator.GetObject(typeof(ICommon), "tcp://localhost:8888/ServerRemote");
            Messages ms = new Messages();
            obj.MessageEvent+=new MessageHandler(ms.MessageArrived);
            obj.Message(tb_out.Text,formobj);
        }

        public void UpdateRTB(string strMess)
        {
            if (rtb_in.InvokeRequired)
                rtb_in.Invoke(new RTBUpdateDelegate(NowUpdateRTB), new object[] { strMess });
            else
                NowUpdateRTB(strMess);
        }

        private void NowUpdateRTB(string strMess)
        {
            rtb_in.AppendText(strMess + "\n");
        }
    }
}

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.ComponentModel;

namespace REWFComm
{
    public delegate void MessageHandler(string myStr, object sender);
    public interface ICommon
    {
        void Message(string passed, object sender);
        event MessageHandler MessageEvent;
    }

    public class Messages : MarshalByRefObject
    {
        public void MessageArrived(string myStr, object sender)
        {
            From HERE I need to tell to client to modefy the control
        }
    }
}

Charith Jayasundara wrote:

But what is the purpose of setting the culture for normal strings?

George_George wrote:

Does anyone have any idea about how to check whether current machine is busy with network I/O?