private void ButtonUpdateProperty_Click(object sender, RoutedEventArgs e)
        {
            if (PropertiesDataGrid.SelectedItem is PropertyDTO selectedProperty)
            {
                var copy   = new PropertyDTO(selectedProperty);
                var window = new CRUPropertyWindow(copy, CRUMode.Update);

                var result = window.ShowDialog();
                if (result.HasValue && result.Value)
                {
                    dataProvider.UpdateProperty(copy);
                    RefreshProperties();
                }
            }
        }
        private void ButtonCreateProperty_Click(object sender, RoutedEventArgs e)
        {
            if (LandlordsDataGrid.SelectedItem is LandlordDTO selectedLandlord)
            {
                var newProperty = new PropertyDTO(selectedLandlord.Id);

                var window = new CRUPropertyWindow(newProperty, CRUMode.Create);

                var result = window.ShowDialog();
                if (result.HasValue && result.Value)
                {
                    dataProvider.CreateProperty(newProperty);
                    RefreshProperties();
                }
            }
        }