在winforms面板内绘制闪烁的圆圈

Question

在我正在工作的项目中，我需要在面板内画一个圆圈并使其闪烁。我已经在PictureBox的Paint事件上绘制了圆形图，但我不能让它闪烁。如果可能，请提供不使用计时器的解决方案。

该绘画由opclblEventoCalidad的TextChanged事件触发，使用this.pboxMaquina.Invalidate（）。

private async void opclblEventoCalidad_TextChanged(object sender, EventArgs e)
{
    await Task.Run(() =>
     {
         if (!String.IsNullOrEmpty(this.CodigoMaquina))
         {
             _continueBlink = true;
             Alarmas = _maquinaContract.ObtenerAlarmas();
             string text = (sender as OPCControls.OPCControlsLabel).Text;
             if (Alarmas != null && Alarmas.Any(m => m.CodigoMaquina == this.CodigoMaquina))
             {
                 ColorInspeccion = Alarmas.First(s => s.CodigoMaquina == CodigoMaquina).CodigoColor;
                 CantidadInspecciones = Alarmas.First(s => s.CodigoMaquina == CodigoMaquina).CantidadInspecciones;
                 this.pboxMaquina.Invalidate();                  
             }
         }
     });
}

private void pboxMaquina_Paint(object sender, PaintEventArgs e)
{
    GraficarAlarmasInspeccion(e);
}


private void GraficarAlarmasInspeccion(PaintEventArgs e)
{
    Pen blackPen = new Pen(Color.Black, 3);
    int rectangleWidth = Math.Min(pnlMaquina.Width, pnlMaquina.Height);
    int width = Convert.ToInt32(rectangleWidth / 2.75);
    int positionX = (pnlMaquina.Width - width) / 2;
    int positionY = (pnlMaquina.Height - width) / 2;

    Rectangle rect = new Rectangle(positionX, positionY, width, width);

    e.Graphics.DrawEllipse(blackPen, rect);
    e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
    e.Graphics.FillEllipse(Brushes.Red, rect);

    SizeF textSize = e.Graphics.MeasureString(this.CantidadInspecciones.ToString(), Font);
    PointF locationToDraw = new PointF();
    locationToDraw.X = (pnlMaquina.Width / 2);
    locationToDraw.Y = (pnlMaquina.Height / 2);
    StringFormat fmt = new StringFormat() { Alignment = StringAlignment.Center, LineAlignment = StringAlignment.Center };
    using (Font myFont = new Font("Arial", (float)(width / 2), FontStyle.Bold))
    {
        e.Graphics.DrawString(this.CantidadInspecciones.ToString(), myFont, Brushes.Black, locationToDraw, fmt);
    }
}

这会产生以下图像。现在我需要让这个圆圈闪烁。提前谢谢。