Não é possível analisar o carimbo de data/hora do Oracle em C #

public static T ConvertOracleValue<T>(this object value)
{
     if (value != null)
     {
          Type typeOfValue = value.GetType();

          if (typeOfValue.Namespace.Contains("Oracle.DataAccess"))
          {
              if (typeOfValue.Name.Equals("OracleTimeStamp"))
              {
                   int tempInt = 0;
                   Oracle.DataAccess.Types.OracleTimeStamp ots = (Oracle.DataAccess.Types.OracleTimeStamp)value;
                   tempInt = Int32.TryParse(ots.Millisecond.ToString("000").Substring(0, 3), out tempInt) ? tempInt : 0;
                   DateTime ret = new DateTime(ots.Year, ots.Month, ots.Day, ots.Hour, ots.Minute, ots.Second, tempInt);
                    return ConvertHelper.ConvertValue<T>(ret);
              }
              if (typeOfValue.Name.Equals("OracleTimeStampLTZ"))
              {
                    int tempInt = 0;
                    Oracle.DataAccess.Types.OracleTimeStampLTZ ots = (Oracle.DataAccess.Types.OracleTimeStampLTZ)value;
                    tempInt = Int32.TryParse(ots.Millisecond.ToString("000").Substring(0, 3), out tempInt) ? tempInt : 0;
                    DateTime ret = new DateTime(ots.Year, ots.Month, ots.Day, ots.Hour, ots.Minute, ots.Second, tempInt);
                    return ConvertHelper.ConvertValue<T>(ret);
              }
              if (typeOfValue.Name.Equals("OracleTimeStampTZ"))
              {
                    int tempInt = 0;
                    Oracle.DataAccess.Types.OracleTimeStampTZ ots = (Oracle.DataAccess.Types.OracleTimeStampTZ)value;
                    tempInt = Int32.TryParse(ots.Millisecond.ToString("000").Substring(0, 3), out tempInt) ? tempInt : 0;
                    DateTime ret = new DateTime(ots.Year, ots.Month, ots.Day, ots.Hour, ots.Minute, ots.Second, tempInt);
                    return ConvertHelper.ConvertValue<T>(ret);
              }

              string temp = value.ToString();
              return ConvertHelper.ConvertValue<T>(temp);
          }
      }
      else
      {
           return default(T);
      }

      return ConvertHelper.ConvertValue<T>(value);
}

public static class ConvertHelper
    {
        public static T ConvertValue<T>(object value)
        {
            Type typeOfT = typeof(T);
            if (typeOfT.BaseType != null && typeOfT.BaseType.ToString() == "System.Enum")
            {
                return (T)Enum.Parse(typeOfT, Convert.ToString(value));
            }
            if ((value == null || value == Convert.DBNull) && (typeOfT.IsValueType))
            {
                return default(T);
            }
            if (value is IConvertible)
            {
                return (T)Convert.ChangeType(value, typeOfT, new CultureInfo("en-GB"));
            }

            return (T)Convert.ChangeType(value, typeOfT);
        }
}