C # - XML object into a method

 public static XmlDocument JsonToXml(OrderDetail orderDetail)
        {
            XmlDocument document = new XmlDocument();
            StringBuilder sb = new StringBuilder();
            using (TextWriter tw = new StringWriter(sb))
            {
                var xmlS = new XmlSerializer(typeof(OrderDetail));
                xmlS.Serialize(tw, orderDetail);
                string serialized = sb.ToString();
                serialized = serialized.Replace(@"xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance""", "");
                serialized = serialized.Replace(@"xmlns:xsd=""http://www.w3.org/2001/XMLSchema""", "");
                document.LoadXml(serialized);
            }

            return document;
        }