//add accommodation
        private void AddAccommodation_OnClick(object sender, RoutedEventArgs e)
        {
            if (AccommodationName.Background != Brushes.White && AccommodationName.BorderBrush != Brushes.Gray ||
                sumOfUnits.Background != Brushes.White && sumOfUnits.BorderBrush != Brushes.Gray ||
                ZipCode.Background != Brushes.White && ZipCode.BorderBrush != Brushes.Gray ||
                TypeOfAccommodation.SelectedIndex == -1 ||
                StyleOfAccommodation.SelectedIndex == -1 ||
                Stars.SelectedIndex == -1 ||
                ComboBoxStreet.SelectedIndex == -1 ||
                Building.Background != Brushes.White && Building.BorderBrush != Brushes.Gray ||
                Building.Text.Length == 0
                )
            {
                MessageBox.Show("Some details you entered are incorrect, please try again", "Failed",
                                MessageBoxButton.OK, MessageBoxImage.Information,
                                MessageBoxResult.None);

                return;
            }

            //var accommodations = new Accommodations();

            //accommodations.HostId = HostId;
            //accommodations.AccommodationAddress.Street = Street.SelectionBoxItem.ToString();
            //accommodations.AccommodationAddress.Building = Building.Text;
            //accommodations.AccommodationAddress.City = City.SelectionBoxItem.ToString();
            //accommodations.AccommodationAddress.Country = Country.SelectionBoxItem.ToString();
            //accommodations.AccommodationAddress.ZipCode = ZipCode.Text;
            //accommodations.AccommodationName = AccommodationName.Text;
            //accommodations.Stars = (int)Stars.SelectionBoxItem;
            //accommodations.StyleOfAccommodation = (List<Style>)StyleOfAccommodation.SelectionBoxItem;
            //accommodations.SumOfUnits = Convert.ToInt32(sumOfUnits.Text);
            try
            {
                _instance.AddAccommodation(AccommodationsWindow);
                MessageBox.Show("successfully updated");
                var welcome = new Welcome();
                welcome.Show();
                Close();
            }
            catch (Exception exception)
            {
                MessageBox.Show(exception.Message);
            }
        }