protected override void OnPaint(PaintEventArgs e)
{
Graphics g = e.Graphics;
g.PixelOffsetMode = PixelOffsetMode.Half;
g.SmoothingMode = SmoothingMode.HighQuality;
using (SolidBrush brush = new SolidBrush(PanelColor))
{
g.DrawRoundedRectangle(brush, ClientRectangle.SizeOffset(1), Radius);
}
}
