void OnButtonClicked_Inicio(object sender, EventArgs args)
{
Page1_2 form = new Page1_2(rutina);
//audio = new ControlAudio();
this.Navigation.PushModalAsync(new Page1_2(rutina));
//await Navigation.PushAsync(new Page1()); // aun no
//MainPage = new NavigationPage(new Page1()); //no se pudo
}
