System.Xml.DocumentXPathNavigator.MoveToNext C# (CSharp) Method

        public override bool MoveToNext(string localName, string namespaceUri) {
            XmlNode sibling = NextSibling(source);
            if (sibling == null) {
                return false;
            }
            do {
                if (sibling.NodeType == XmlNodeType.Element
                    && sibling.LocalName == localName
                    && sibling.NamespaceURI == namespaceUri) {
                    source = sibling;
                    return true;
                }
                sibling = NextSibling(sibling);
            }
            while (sibling != null);
            return false;
        }