public static int AppendNamespaces([NotNull] this XmlDocument thisValue, [NotNull] params string[] namespaceURI)
        {
            if (namespaceURI.IsNullOrEmpty())
            {
                return(0);
            }
            XmlNamespaceManager manager = new XmlNamespaceManager(thisValue.NameTable);

            return(manager.Append(namespaceURI));
        }