public void AddReport(Report report)
            {
                ReportGroupByClassName reports = null;

                if (!groupByGrade.TryGetValue(report.GradeName, out reports))
                {
                    reports = new ReportGroupByClassName();
                    groupByGrade[report.GradeName] = reports;
                }
                reports.AddReport(report);
            }
 public void AddReport(Report report)
 {
     ReportGroupByClassName reports = null;
     if (!groupByGrade.TryGetValue(report.GradeName, out reports))
     {
         reports = new ReportGroupByClassName();
         groupByGrade[report.GradeName] = reports;
     }
     reports.AddReport(report);
 }