C# problem with BackgroundWorker

I have a problem with a component "BackgroundWorker"

When I click on a button I have to perform n iteration开发者_StackOverflows that take time and I have to delegate this operation to another thread

I followed this tutorial: tutorial (in french)

Here is my code:

    private void btnIterate_Click(object sender, EventArgs e)
    {
        bgwIterer.RunWorkerAsync();                
    }

    private void bgwIterer_DoWork(object sender, DoWorkEventArgs e)
    {
        BackgroundWorker worker = sender as BackgroundWorker;
        e.Result = new Iterate(btnIterate, btnReinit, txtInput, lblState, entree, worker, e);
    }

    private void bgwIterer_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        this.lblState.Text = e.ProgressPercentage;
    }

bgwIterer is my BackgroundWorker component and here is the method I would like to delegate:

class Iterate
{
    // Constructeur surchargé de la classe Iterate:
    public Iterate(Button mybtnIterate, Button mybtnReinit,
    TextBox mytxtInput, Label mylblState,
    int myentree, BackgroundWorker worker,
    DoWorkEventArgs e)
    {
        int pourcent = 0;
        int var0 = 0, var1;
        mybtnIterate.Enabled = false;
        mytxtInput.Focus();
        do
        {
            var1 = 0;
            do
            {
                ++var1;
            }
            while (var1 < myentree);
            ++var0;
            pourcent = (var0 / myentree) * 100;
            worker.ReportProgress(pourcent);
        }
        while (var0 < myentree);
        mylblState.Text = "Terminé !";
        mytxtInput.Enabled = false;
    }

}

and this is the problem:

The type or namespace name 'BackGroundWorker' could not be found (are you missing a using directive or an assembly reference?)

Does someone have an idea?

Try to add:

using System.ComponentModel;

Class name is BackgroundWorker, not BackGroundWorker - that's why.