private void deleteRoomButton_Click(object sender, EventArgs e)
        {
            Room room;
            int  roomId;

            string employeeItem = managementRoomListBox.SelectedItem.ToString();
            int    employeeId   = Convert.ToInt32(employeeItem.Substring(0, employeeItem.IndexOf(' ')));

            roomId = employeeId;
            room   = new Room(roomId, 0, null, 0, null, false);
            this.hms.DeleteRoom(room);
            string employeeItems         = managementHotelListBox.SelectedItem.ToString();
            int    employeeIds           = Convert.ToInt32(employeeItems.Substring(0, employeeItems.IndexOf(' ')));
            int    HotelId               = employeeIds;
            Dictionary <int, Room> rooms = hms.getRoomsByHotelId(HotelId);

            managementRoomListBox.Items.Clear();
            roomListBox.Items.Clear();
            // Clear the current list of items

            foreach (var pair in rooms)
            {
                managementRoomListBox.Items.Add($"{pair.Value.getId()} - {pair.Value.getType()} - ${pair.Value.getPrice()}");
                roomListBox.Items.Add($"{pair.Value.getId()} - {pair.Value.getType()} - ${pair.Value.getPrice()}");
            }
            managementRoomListBox.Update();
            roomListBox.Update();


            ExceptionInterface excep = new ExceptionInterface("Successfully deleted room");

            excep.Show();
        }
        private void createNewRoomButton_Click(object sender, EventArgs e)
        {
            hms    = new HotelManagementSystem();
            hotels = new Dictionary <int, Hotel>();
            Room room;

            string employeeItem = managementHotelListBox.SelectedItem.ToString();
            int    employeeId   = Convert.ToInt32(employeeItem.Substring(0, employeeItem.IndexOf(' ')));
            int    HotelId      = employeeId;
            string type         = this.roomTypeTextbox.Text;
            string RoomPrice    = roomPriceTextbox.Text;
            float  price        = (float)Convert.ToDouble(RoomPrice);


            room = new Room(1, HotelId, type, price, null, false);
            this.hms.AddRoom(room);
            Dictionary <int, Room> rooms = hms.getRoomsByHotelId(HotelId);

            managementRoomListBox.Items.Clear();
            roomListBox.Items.Clear();
            // Clear the current list of items

            foreach (var pair in rooms)
            {
                managementRoomListBox.Items.Add($"{pair.Value.getId()} - {pair.Value.getType()} - ${pair.Value.getPrice()}");
            }
            managementRoomListBox.Update();
            roomListBox.Update();

            ExceptionInterface excep = new ExceptionInterface("Successfully created new room");

            excep.Show();
        }