System.Windows.Forms.TreeView.ProccesNode C# (CSharp) Method

        protected virtual void ProccesNode(TreeNode node)
        {
            if (node.IsVisible == false) return;

            if (node != root) node.Bounds = _GetNodeBounds(node);

            if (node.IsExpanded == true)
                for (int i = 0; i < node.Nodes.Count; i++)
                    ProccesNode(node.Nodes[i]);
        }
        public override void Refresh()