protected virtual void OnRightMouseUp(MouseEventArgs e)
{
CellRightClickEventArgs args = new CellRightClickEventArgs();
this.BuildCellEvent(args, e.Location);
this.OnCellRightClick(args);
if (!args.Handled) {
if (args.MenuStrip != null) {
args.MenuStrip.Show(this, args.Location);
}
}
}