private async void CreateParking1(object sender, EventArgs e)
{
Parking parking = new Parking();
ParkingPage parkingpage = new ParkingPage();
parkingpage.BindingContext = parking;
await Navigation.PushAsync(parkingpage);
}
private async void OnItemSelected(object sender, SelectedItemChangedEventArgs e)
{
Parking selectedParking = (Parking)e.SelectedItem;
ParkingPage parkingPage = new ParkingPage();
parkingPage.BindingContext = selectedParking;
await Navigation.PushAsync(parkingPage);
}