public SeatingChartInfo GetSeatingChart(int classId, int markingPeriodId)
        {
            var seatingChart = ConnectorLocator.SeatingChartConnector.GetChart(classId, markingPeriodId);

            if (seatingChart == null)
            {
                return(null);
            }
            return(SeatingChartInfo.Create(seatingChart));
        }
        public SeatingChartInfo GetSeatingChart(int classId, int markingPeriodId)
        {
            var seatingChart = SeatingChartStorage.GetChart(classId, markingPeriodId);

            return(SeatingChartInfo.Create(seatingChart));
        }