Converts several date/time formats to standard XML Date/ Time

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        /// <summary>
        /// This takes a vendor's non-standard dates, such as 5/1/2008 and formats as XML Date.
        /// (i.e. the month may one or two digits, the day may be one or two digits).
        /// Neal Walters - changed on 09/03/2008 to  throw exception. 
        /// also tested to make sure it handles all the following dates (and it does)
        ///    string testDate1 = "03/09/2008";
        ///    string testDate2 = "1999-05-31";
        ///    string testDate3 = "03/09/2008 10:50:16.157";
        ///    string testDate4 = "1999-05-31T13:20:00.000-05:00";
        ///    string testDate5 = "2008-09-03 10:50:16.157";
        ///    string testDate6 = "2008-09-32";
        /// </summary>
        /// <param name="inDate"></param>
        /// <returns></returns>
        public static string ConvertDateTimetoXmlDateTime(string inDate)
        {
            try
            {
                DateTime dtIn = DateTime.Parse(inDate);
                return System.Xml.XmlConvert.ToString(dtIn, System.Xml.XmlDateTimeSerializationMode.Local);

            }
            catch
            {
                string errorMessage = "invalid-Date/Time-conversion from value='" + inDate + "'";
                throw new Exception(errorMessage);
                //return errorMessage;
            }
        }

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