간편간편 열매 먹은 TreeView 검색함수 [재귀호출]

        //TreeView의 검색
        public TreeNode SearchNode(TreeNodeCollection aNodes, string strKey)
        {
            foreach ( TreeNode node in aNodes )
            {
                if ( node.Text.Contains(strKey)  )
                    return node;

                TreeNode findNode = SearchNode(node.Nodes, strKey);

                if ( findNode != null )
                    return findNode;
            }
            return null;
        }