private async void CreateMovie(object sender, EventArgs e)
{
var movie = new Movie();
MoviePage addMoviePage = new MoviePage();
addMoviePage.BindingContext = movie;
await Navigation.PushAsync(addMoviePage);
}
private async void OnItemSelected(object sender, SelectedItemChangedEventArgs e)
{
var selectedMovie = (Movie)e.SelectedItem;
var moviePage = new MoviePage();
moviePage.BindingContext = selectedMovie;
await Navigation.PushAsync(moviePage);
}