public C1Icon CheckedIcon {get; set;}

public static C1Icon CheckedRadio
{
    get
    {
        var mainIcon = new C1CompositeIcon();
        var markIcon = new C1PathIcon
        {
            Data = "M 2.5,5 a 2.5,2.5 0 1,0 5,0 a 2.5,2.5 0 1,0 -5,0 Z",
            ViewBox = new Rectangle(0, 0, 11, 11),
            Key = "FrontIcon"
        };
        var borderIcon = new C1PathIcon
        {
            Data = "M 0 5 a 5,5 0 1,0 10,0a 5,5 0 1,0 -10,0 Z",
            ViewBox = new Rectangle(0, 0, 11, 11),
            Key = "BorderIcon"
        };
        var backIcon = new C1PathIcon
        {
            Data = "M 0.5,5 a 4.5,4.5 0 1,0 9,0a 4.5,4.5 0 1,0 -9,0 Z",
            ViewBox = new Rectangle(0, 0, 11, 11),
            Key = "BackIcon"
        };
        mainIcon.Icons.Add(borderIcon);
        mainIcon.Icons.Add(backIcon);
        mainIcon.Icons.Add(markIcon);
        mainIcon.Size = new Size(20, 20);
        return mainIcon;
    }
}
            
    C1RadioButton.CheckedIcon = CheckedRadio;
 
    C1RadioButton.Styles.Normal.Glyph.Checked.Default.BackColor = Color.FromArgb(0, 95, 184);
    C1RadioButton.Styles.Normal.Glyph.Checked.Default.ForeColor = Color.White;
    C1RadioButton.Styles.Normal.Glyph.Checked.Default.BorderColor = Color.FromArgb(0, 95, 184);
    C1RadioButton.Styles.Normal.Glyph.Checked.Hot.BackColor = Color.FromArgb(26, 111, 191);
    C1RadioButton.Styles.Normal.Glyph.Checked.Hot.ForeColor = Color.White;
    C1RadioButton.Styles.Normal.Glyph.Checked.Hot.BorderColor = Color.FromArgb(26, 111, 191);
    C1RadioButton.Styles.Normal.Glyph.Checked.Pressed.BackColor = Color.FromArgb(51, 127, 198);
    C1RadioButton.Styles.Normal.Glyph.Checked.Pressed.ForeColor = Color.FromArgb(194, 217, 238);
    C1RadioButton.Styles.Normal.Glyph.Checked.Pressed.BorderColor = Color.FromArgb(51, 127, 198);
    C1RadioButton.Styles.Normal.Glyph.Checked.HotPressed.BackColor = Color.FromArgb(51, 127, 198);
    C1RadioButton.Styles.Normal.Glyph.Checked.HotPressed.ForeColor = Color.FromArgb(194, 217, 238);
    C1RadioButton.Styles.Normal.Glyph.Checked.HotPressed.BorderColor = Color.FromArgb(51, 127, 198);
    C1RadioButton.Styles.Normal.Glyph.Checked.Disabled.BackColor = Color.FromArgb(200, 200, 200);
    C1RadioButton.Styles.Normal.Glyph.Checked.Disabled.ForeColor = Color.FromArgb(255, 255, 255);
    C1RadioButton.Styles.Normal.Glyph.Checked.Disabled.BorderColor = Color.FromArgb(200, 200, 200);