private async Task LoadSubjectDataList()
        {
            SubjectDataService subjectDataService = new SubjectDataService(new EntityFramework.TimetableManagerDbContext());

            SubjectList = await subjectDataService.GetSubjectsAsync();

            SubjectList.ForEach(e =>
            {
                SubjectDataList.Add(e);
            });
        }
        private async Task LoadSubjectData()
        {
            SubjectDataService subjectDataService = new SubjectDataService(new EntityFramework.TimetableManagerDbContext());

            SubjectList = await subjectDataService.GetSubjectsAsync();

            SubjectList.ForEach(f =>
            {
                int sum = f.LectureHours + f.EvaluationHours + f.TutorialHours + f.LabHours;
                SubStatList.Add(new SubStatGrid {
                    module = f.SubjectName, count = sum
                });
            });
        }