internal void Invalidate()
{
if (treeView == null || !treeView.IsHandleCreated)
{
return;
}
RectangleF bounds = Bounds;
if (bounds != Rectangle.Empty)
{
// Include the focus rectangle.
bounds = new Rectangle(0, (int)bounds.Y - 1, (int)bounds.Right + 2, (int)bounds.Height + 2);
treeView.Invalidate(TreeViewEx.RectIFromRectF(bounds));
}
}