System.Xml.XmlElementList.GetMatchingNode C# (CSharp) Méthode

        private XmlNode GetMatchingNode( XmlNode n, bool bNext ) {
            Debug.Assert( n!= null );
            XmlNode node = n;            
            do {
                if ( bNext )
                    node = NextElemInPreOrder( node );
                else
                    node = PrevElemInPreOrder( node );
            } while ( node != null && !IsMatch( node ) );
            return node;
        }