public void Add(ReportData data)
            {
                CheckReportGroupByClassName reports = null;

                if (!groupByGradeName.TryGetValue(data.GradeName, out reports))
                {
                    reports = new CheckReportGroupByClassName();
                    groupByGradeName[data.GradeName] = reports;
                }
                reports.Add(data);
            }
 public void Add(ReportData data)
 {
     CheckReportGroupByClassName reports = null;
     if (!groupByGradeName.TryGetValue(data.GradeName, out reports))
     {
         reports = new CheckReportGroupByClassName();
         groupByGradeName[data.GradeName] = reports;
     }
     reports.Add(data);
 }