public List <ToDoItem> OrderItems(OrderBySelection orderBySelection)
        {
            List <ToDoItem>    orderedItems       = new List <ToDoItem>();
            ToDoItemRepository toDoItemRepository = new ToDoItemRepository();

            switch (orderBySelection)
            {
            case OrderBySelection.CreateDate:
                orderedItems = toDoItemRepository.OrderByCreateDate(selectedList.listId);
                break;

            case OrderBySelection.Deadline:
                orderedItems = toDoItemRepository.OrderByDeadline(selectedList.listId);
                break;

            case OrderBySelection.Name:
                orderedItems = toDoItemRepository.OrderByName(selectedList.listId);
                break;

            case OrderBySelection.Status:
                orderedItems = toDoItemRepository.OrderByStatus(selectedList.listId);
                break;

            default:
                break;
            }
            return(orderedItems);
        }