protected override void OnRenderToolStripBackground(ToolStripRenderEventArgs e)
{
Graphics g = e.Graphics;
Rectangle bounds = e.AffectedBounds;
Rectangle rect = new Rectangle(bounds.X, bounds.Y, bounds.Width - 1, bounds.Height - 1);
using (Brush brush = new SolidBrush(this._backColor))
{
g.FillRectangle(brush, rect);
}
using (Pen pen = new Pen(this._borderColor))
{
g.DrawRectangle(pen, rect);
}
//base.OnRenderToolStripBackground(e);
}