Estoy tratando de tener un hilo separado en una aplicación WinForms C #, inicie un trabajador de fondo que controle una Barra de progreso (marquesina). El problema es que cuando trato de establecer la barra en visible, simplemente no hace nada, y he probado muchas formas de Invocar pero no parecen ayudar.

El siguiente metodoprogressBarCycle se llama desde un hilo separado.

    BackgroundWorker backgroundWorker = new BackgroundWorker();

    public void progressBarCycle(int duration)
    {
        backgroundWorker.DoWork += new DoWorkEventHandler(backgroundWorker_DoWork);
        backgroundWorker.ProgressChanged += new ProgressChangedEventHandler(backgroundWorker_ProgressChanged);
        backgroundWorker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(backgroundWorker_RunWorkerCompleted);
        backgroundWorker.WorkerReportsProgress = true;
        backgroundWorker.WorkerSupportsCancellation = true;
        backgroundWorker.RunWorkerAsync(duration);
    }

    private void backgroundWorker_DoWork(object sender, DoWorkEventArgs e)
    {
        BackgroundWorker worker = sender as BackgroundWorker;

        worker.ReportProgress(0);

        DateTime end = DateTime.Now.AddMilliseconds((int)e.Argument);
        while (DateTime.Now <= end)
        {
            System.Threading.Thread.Sleep(1000);
        }
    }

    private void backgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
    {
        if (!this.IsHandleCreated)
            this.CreateHandle();
        statusStrip1.Invoke((MethodInvoker)delegate
        {
            progressBar1.Visible = false;
        });
        //    if (!this.IsHandleCreated)
        //    {
        //        this.CreateHandle();
        //        if (InvokeRequired) this.Invoke((MethodInvoker)(() => progressBar1.Visible = false));
        //        else progressBar1.Visible = false;
        //    }
        //    else
        //        if (InvokeRequired) this.Invoke((MethodInvoker)(() => progressBar1.Visible = false));
        //        else progressBar1.Visible = false;
    }

    private void backgroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        if (!this.IsHandleCreated)
            this.CreateHandle();
        statusStrip1.Invoke((MethodInvoker)delegate
        {
            progressBar1.Visible = true;
        });
        //    if (!this.IsHandleCreated)
        //    {
        //        this.CreateHandle();
        //        if (InvokeRequired) this.Invoke((MethodInvoker)(() => progressBar1.Visible = true));
        //        else progressBar1.Visible = true;
        //    }
        //    else
        //        if (InvokeRequired) this.Invoke((MethodInvoker)(() => progressBar1.Visible = true));
        //        else progressBar1.Visible = true;
    }

¿Me estoy perdiendo algo obvio aquí? Las secciones de comentarios son otras cosas que he probado.