public void reverseEnroll(CartAndScheduleEntry entry)
 {
     entry.UpdateRemoveFromCart();
     CartSelections.AddToCart(entry);
     ScheduleSelections.RemoveFromSchedule(entry);
 }
 public void Execute(object parameter)
 {
     ScheduleSelections.RemoveFromSchedule(entry);
     Messages.AddUndoMessage("Removed " + entry.Department + " " + entry.Number + " in " + entry.Semester + " from Schedule", () => ScheduleSelections.AddToSchedule(entry));
 }