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

        private static XmlNamespaceManager GetNamespaceManager(XmlNode node, XmlDocument document) {
            XmlNamespaceManager namespaceManager = new XmlNamespaceManager(document.NameTable);
            List<XmlElement> elements = new List<XmlElement>(); 

            while (node != null) {
                XmlElement element = node as XmlElement;
                if (element != null
                    && element.HasAttributes) {
                    elements.Add(element);
                }
                node = node.ParentNode;
            }
            for (int i = elements.Count - 1; i >= 0; i--) {
                namespaceManager.PushScope();
                XmlAttributeCollection attributes = elements[i].Attributes;
                for (int j = 0; j < attributes.Count; j++) {
                    XmlAttribute attribute = attributes[j];
                    if (attribute.IsNamespace) {
                        string prefix = attribute.Prefix.Length == 0 ? string.Empty : attribute.LocalName;
                        namespaceManager.AddNamespace(prefix, attribute.Value);
                    }
                }
            }
            return namespaceManager;
        }