// обработка нажатия кнопки добавления
private async void CreateFavoritePlace(object sender, EventArgs e)
{
FavoritePlace favoritePlace = new FavoritePlace();
FavoritePlacePage favoritePlacePage = new FavoritePlacePage();
favoritePlacePage.BindingContext = favoritePlace;
await Navigation.PushAsync(favoritePlacePage);
}
// обработка нажатия элемента в списке
private async void OnItemSelected(object sender, SelectedItemChangedEventArgs e)
{
FavoritePlace selectedFavoritePlace = (FavoritePlace)e.SelectedItem;
FavoritePlacePage favoritePlacePage = new FavoritePlacePage();
favoritePlacePage.BindingContext = selectedFavoritePlace;
await Navigation.PushAsync(favoritePlacePage);
}