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

        private XmlNode PreviousSibling(XmlNode node) {
            XmlNode sibling = node.PreviousSibling; 

            if (!document.HasEntityReferences) {
                return sibling; 
            }
            return PreviousSiblingTail(node, sibling);
        }