System.Xml.XmlTextReaderImpl.AllocNode C# (CSharp) Method

        private NodeData AllocNode(int nodeIndex, int nodeDepth)
        {
            Debug.Assert(nodeIndex < _nodes.Length);
            if (nodeIndex >= _nodes.Length - 1)
            {
                NodeData[] newNodes = new NodeData[_nodes.Length * 2];
                Array.Copy(_nodes, 0, newNodes, 0, _nodes.Length);
                _nodes = newNodes;
            }
            Debug.Assert(nodeIndex < _nodes.Length);

            NodeData node = _nodes[nodeIndex];
            if (node == null)
            {
                node = new NodeData();
                _nodes[nodeIndex] = node;
            }
            node.depth = nodeDepth;
            return node;
        }