XML Document

        public static nonpublicExecutionReport xmlToObj(String xmlData)
        {
            var serializer = new XmlSerializer(typeof(nonpublicExecutionReport));
            var stringReader = new StringReader(xmlData);
            var obj = (nonpublicExecutionReport)serializer.Deserialize(stringReader);
            stringReader.Dispose();
            return obj;
        }

invalid operation exception was unhandled

there is an error in xml document(93,2).

Please help.

Thank you