public string ToXMLFragment()
        {
            IMwsWriter writer = new MwsXmlBuilder(false, System.Xml.ConformanceLevel.Fragment);

            this.WriteFragmentTo(writer);
            return(writer.ToString());
        }
        public string ToXML()
        {
            IMwsWriter writer = new MwsXmlBuilder();

            this.WriteTo(writer);
            return(writer.ToString());
        }