protected virtual void DrawStringCenter(Graphics g, string text)
{
if (text != null && text != string.Empty)
{
var c = Chart.ToScreenPoint(Center);
var tsz = g.MeasureString(text, Font);
g.DrawString(text, Font, TextBrush, c.X - tsz.Width / 2, c.Y - tsz.Height / 2);
}
}
/// <summary>