internal override void Add(BaseItemWin item)
{
if (item is HomeworkWin)
{
Homework.InsertSorted(item as HomeworkWin);
}
else if (item is ExamWin)
{
Exams.InsertSorted(item as ExamWin);
}
else if (item is ScheduleWin)
{
Schedules.InsertSorted(item as ScheduleWin);
}
else if (item is WeightCategoryWin)
{
WeightCategories.InsertSorted(item as WeightCategoryWin);
}
else
{
throw new NotImplementedException("Item to be added to Class wasn't any of the supported types.");
}
}