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C# Winform 更改radioButton颜色

自定义一个控件，继承RadioButton类，重写OnPaint方法，参考代码：

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 public class ColoredRadioButton : RadioButton
{ 

    public ColoredRadioButton()
    {
            // Allows for Overlaying
        SetStyle(
         ControlStyles.UserPaint   //控件自行绘制，而不使用操作系统的绘制
         ControlStyles.AllPaintingInWmPaint  //忽略擦出的消息，减少闪烁。
         ControlStyles.OptimizedDoubleBuffer //在缓冲区上绘制，不直接绘制到屏幕上，减少闪烁。
         ControlStyles.ResizeRedraw  //控件大小发生变化时，重绘。                  
         ControlStyles.SupportsTransparentBackColor, true);
        BackColor = Color.Transparent;
    }
    protected override void OnPaint(PaintEventArgs e)
    {
        m_circle = new Rectangle(7, 9, 8, 8 /*Magic Numbers*/);
        m_outlinerect = new Rectangle(4, 6, 14, 14);
        m_outline = new Pen(new SolidBrush(Color.FromArgb(0,163,235)), 1.5F /*Magic Numbers*/);

            // Init
            //base.OnPaint(e);
        Graphics g = e.Graphics;

        g.Clear(Color.White);
        using (SolidBrush brush = new SolidBrush(ForeColor))
            g.DrawString(Text, Font, brush, 27, 4);

        g.SmoothingMode = SmoothingMode.AntiAlias;

            // Overlay Graphic
        if (Checked)
        {
            g.FillEllipse(new SolidBrush(Color.FromArgb(0, 163, 235)), m_circle);
            g.DrawEllipse(m_outline, m_outlinerect);
        }
        else
        {
            g.FillEllipse(new SolidBrush(Color.White), m_circle);
            g.DrawEllipse(m_outline, m_outlinerect);
        }
    }
}