ZForge.Controls.TreeViewAdv.Tree.AutoRowHeightLayout.GetRowBounds C# (CSharp) Method

        public Rectangle GetRowBounds(int rowNo)
        {
            if (rowNo >= _rowCache.Count)
            {
                int count = _rowCache.Count;
                int y = count > 0 ? _rowCache[count - 1].Bottom : 0;
                for (int i = count; i <= rowNo; i++)
                {
                    int height = GetRowHeight(i);
                    _rowCache.Add(new Rectangle(0, y, 0, height));
                    y += height;
                }
                if (rowNo < _rowCache.Count - 1)
                    return Rectangle.Empty;
            }
            if (rowNo >= 0 && rowNo < _rowCache.Count)
                return _rowCache[rowNo];
            else
                return Rectangle.Empty;
        }