c# – Thread.Sleep(1);对于Silverlight动画来说太慢了,还有其他

那么还有Thread.sleep的替代方案来减慢我的循环吗？

void DrawGasket(object sender,DoWorkEventArgs e)
    {
        Random rnd = new Random();
        Color color = Colors.White;
        while (Counter <= noOfPx)
        {
            switch (rnd.Next(3))
            {
                case 0:
                    m_lastPoint.X = (m_top.X + m_lastPoint.X)/2;
                    m_lastPoint.Y = (m_top.Y + m_lastPoint.Y)/2;
                    color = Colors.White;
                    break;
                case 1:
                    m_lastPoint.X = (m_left.X + m_lastPoint.X)/2;
                    m_lastPoint.Y = (m_left.Y + m_lastPoint.Y)/2;
                    color = Colors.Orange;
                    break;
                case 2:
                    m_lastPoint.X = (m_right.X + m_lastPoint.X)/2;
                    m_lastPoint.Y = (m_right.Y + m_lastPoint.Y)/2;
                    color = Colors.Purple;
                    break;
            }
            Dispatcher.BeginInvoke(() =>
            {
                var px = new Rectangle { 
                                       Height = m_pxSize,Width = m_pxSize,Fill = new SolidColorBrush(color) 
                                       };
                Canvas.SetTop(px,m_lastPoint.Y);
                Canvas.SetLeft(px,m_lastPoint.X);
                can.Children.Add(px);
                lblCounter.Text = Counter.ToString();
            });
            Counter++;
            Thread.Sleep(1);
        }
    }