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