protected override bool OnBackButtonPressed()
        {
            try
            {
                if (App.nbrPopup > 0)
                {
                    ContactPage.CloseAllPopup();

                    return(true);
                }
                else if (Accueil.nbrpopupA > 0)
                {
                    nbrpopupA--;
                    APropos.CloseAllPopup();
                    return(true);
                }
                else
                {
                    // Do something if there are not any pages in the `PopupStack`
                    var var2 = Accueil.buttonValeur;
                    if (var2 != "accueil")
                    {
                        App.Current.MainPage = new Accueil();
                        Accueil.buttonValeur = "accueil";
                        return(true);
                    }
                    else
                    {
                        return(false);
                    }
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex);
            }
            return(true);
        }