/// <summary>
        /// Invoked when user clicks on edit room button
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void OnEditRoom(object sender, RoutedEventArgs e)
        {
            if (!IsRoomSelected)
            {
                MessageBox.Show("Najpierw wybierz pokój", "Błąd", MessageBoxButton.OK, MessageBoxImage.Warning);
                return;
            }
            AddRoomWindow window = new AddRoomWindow(context, SelectedHotelId, (room)roomDropdown.SelectedItem)
            {
                Owner = this
            };

            window.ShowDialog();
            LoadRooms(SelectedHotelId);
        }
        /// <summary>
        /// Invoked when users clicks on add room button
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void OnAddRoom(object sender, RoutedEventArgs e)
        {
            if (!IsHotelSelected)
            {
                MessageBox.Show("Najpierw wybierz hotel", "Błąd", MessageBoxButton.OK, MessageBoxImage.Warning);
                return;
            }
            AddRoomWindow window = new AddRoomWindow(context, SelectedHotelId)
            {
                Owner = this
            };

            window.ShowDialog();
            LoadRooms(SelectedHotelId);
        }