static class Program
{
    static void Main(string[] args)
    {
        System.Console.WriteLine(string.Format("Just Starting {0}", Thread.CurrentThread.ManagedThreadId));
        w = new BackgroundWorker();
        w.DoWork += new DoWorkEventHandler(w_DoWork);
        w.RunWorkerCompleted += new RunWorkerCompletedEventHandler(w_RunWorkerCompleted);
        w.ProgressChanged += new ProgressChangedEventHandler(w_ProgressChanged);
        w.RunWorkerAsync();

        Thread.Sleep(500);


        Thread.Sleep(2000);
        Application.DoEvents();

        var l = new ListTest();

        l.ShowDialog();
    }

    static BackgroundWorker w;
    static void w_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        System.Console.WriteLine(string.Format("Progress Changed, percentage= {1}. {0}", Thread.CurrentThread.ManagedThreadId, e.ProgressPercentage));
    }

    static void w_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
    {
        System.Console.WriteLine(string.Format("Worker Completed {0}", Thread.CurrentThread.ManagedThreadId));
    }

    static void w_DoWork(object sender, DoWorkEventArgs e)
    {
        System.Console.WriteLine(string.Format("Doing Work {0}", Thread.CurrentThread.ManagedThreadId));
        Thread.Sleep(1000);
        (sender as BackgroundWorker).ReportProgress(50);
        Thread.Sleep(1000);
        System.Console.WriteLine(string.Format("Done Working {0}", Thread.CurrentThread.ManagedThreadId));
    }
}