System.Windows.Forms.TreeNode_Old.GetRootNode C# (CSharp) Method

        internal TreeNode_Old GetRootNode()
        {
            TreeNode_Old parent_node;
            if (Parent == null)
                parent_node = this;
            else
            {
                parent_node = Parent;
                while (parent_node.Parent != null)
                    parent_node = parent_node.Parent;
            }
            return parent_node;
        }
        internal FindResult FindTreeIndex(TreeNode_Old node)