private void GetOperation()
        {
            int id = -1;

            while (id < 0)
            {
                id = view.EnterId();
            }
            switch (view.entity)
            {
            case Entity.Room:
                List <Room> r_table = new List <Room>()
                {
                    roomDAO.Get(id)
                };
                view.PrintTable(view.Rooms_table(r_table));
                break;

            case Entity.Guest:
                List <Guest> g_table = new List <Guest>()
                {
                    guestDAO.Get(id)
                };
                view.PrintTable(view.Guests_table(g_table));
                break;

            case Entity.Booking:
                List <Booking> b_table = new List <Booking>()
                {
                    bookingDAO.Get(id)
                };
                view.PrintTable(view.Booking_table(b_table));
                break;
            }
            view.Success();
        }