System.Windows.Forms.TreeView_Old.OnMouseDoubleClick C# (CSharp) Method

        protected override void OnMouseDoubleClick(MouseEventArgs e)
        {
            base.OnMouseDoubleClick(e);
            var mclient = PointToClient(MousePosition);
            for (int i = 0; i < _renderList.Count; i++)
            {
                Rectangle nodeRect = new Rectangle(0, i * NodeHeight, Width - _scrollWidth, NodeHeight);
                if (nodeRect.Contains(mclient))
                {
                    _renderList[i].Node.CollapseExpand();
                    _renderList[i].Node.OnDoubleClickCall(e, _renderList[i].Node);
                    _RefreshList();
                    break;
                }
            }
            Refresh();
        }
        protected override void OnMouseDown(MouseEventArgs e)