WPF Slider改变了Ticks的位置和数量

Question

我需要能够更改滑块上的刻度，以下代码似乎仅在第一次调用时才起作用。我有什么想法我做错了吗？

     private void ApplyTicks()
    {
        try
        {
            this.timeSlider.Ticks.Clear();

            if (this.ticks != null)
            {
                DoubleCollection tickMarks = new DoubleCollection();

                foreach (double tick in this.ticks)
                {
                    tickMarks.Add(tick);
                }

                if (tickMarks.Count <= 0)
                {
                    tickMarks.Add(0.0);

                }

                this.timeSlider.Ticks = tickMarks;
                log4net.LogManager.GetLogger("StreamCodersVideoPlayerControl.ApplyTicks").Debug("Ticks applied.");
            }
        }
        catch (Exception e)
        {
            WPFMessageBox.Show("Error", e.Message);
            log4net.LogManager.GetLogger("StreamCodersVideoPlayerControl.ApplyTicks").Error("Error: " + e.Message);
        }
    }