System.Xml.DocumentXPathNavigator.SelectDescendants C# (CSharp) Méthode

        public override XPathNodeIterator SelectDescendants( XPathNodeType nt, bool includeSelf ) {
            if ( nt == XPathNodeType.Element ) {
                XmlNodeType curNT = source.NodeType;
                if ( curNT != XmlNodeType.Document && curNT != XmlNodeType.Element ) {
                    //only Document, Entity, Element node can have Element node as children ( descendant )
                    //entity nodes should be invisible to XPath data model
                    return new DocumentXPathNodeIterator_Empty( this );
                }
                if ( includeSelf )
                    return new DocumentXPathNodeIterator_AllElemChildren_AndSelf( this );
                return new DocumentXPathNodeIterator_AllElemChildren( this );
            }
            return base.SelectDescendants( nt, includeSelf );
        }