control.invoke must be used to interact with controls created on a separate thread in .net CF

On version 1 of the .NET Compact Framework, applications which attempted to update their user interface from a worker thread would typically hang.    Having an application hang is an unpleasant user experience.

Control.Invoke must be used to interact with controls created on a separate thread. The first step to fix our snippet is to define a delegate.

public int c = 0;
        private delegate void UpdateStatusDelegate();

Next, we add an implementation of a method that matches our delegate's signature

public void newload()
        {
            int j = 0;
            for (int i = 0; i == j; i++)
            {
                Thread.Sleep(5000);
                if (this.InvokeRequired)
                {
                    // we were called on a worker thread
                    this.Invoke(new UpdateStatusDelegate(fncontrol) );
                }

                MessageBox.Show("working count: "+c+" " );
                c++;
                j++;
            }
        }

private void button1_Click(object sender, EventArgs e)
        {
            Thread t = new Thread(new System.Threading.ThreadStart(newload));

            t.Start();
            t.IsBackground = true;
        }
        public void fncontrol()
        {
            this.textBox1.Text = c.ToString();
            this.progressBar1.Value = c;
        }
public void newload()
        {
            int j = 0;
            for (int i = 0; i == j; i++)
            {

                Thread.Sleep(5000);
                if (this.InvokeRequired)
                {
                    // we were called on a worker thread

                    this.Invoke(new UpdateStatusDelegate(fncontrol) );

                }

                MessageBox.Show("working count: "+c+" " );
                c++;
                j++;
            }
        }

private void button1_Click(object sender, EventArgs e)
        {

            Thread t = new Thread(new System.Threading.ThreadStart(newload));

            t.Start();
            t.IsBackground = true;
        }
        public void fncontrol()
        {
            this.textBox1.Text = c.ToString();
            this.progressBar1.Value = c;
        }

Full Code

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

namespace sdpThread
{
    public partial class Form1 : Form
    {
        public int c = 0;
        private delegate void UpdateStatusDelegate();

        public Form1()
        {
            InitializeComponent();
        }

        public void newload()
        {

            int j = 0;
            for (int i = 0; i == j; i++)
            {

                Thread.Sleep(5000);
                if (this.InvokeRequired)
                {
                    // we were called on a worker thread

                    this.Invoke(new UpdateStatusDelegate(fncontrol) );

                }

                MessageBox.Show("working count: "+c+" " );

                c++;
                j++;
            }
        }


        private void button1_Click(object sender, EventArgs e)
        {

            Thread t = new Thread(new System.Threading.ThreadStart(newload));
            t.Start();

            t.IsBackground = true;
        }
        public void fncontrol()
        {
            this.textBox1.Text = c.ToString();
            this.progressBar1.Value = c;
        }
    }
}

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