public App() { InitializeComponent(); // determine page to navigate to var tokenClient = new TokenClient(); var isLoggedIn = tokenClient.IsLoggedIn(); NavigationPage mainPage; if (isLoggedIn) { mainPage = new NavigationPage(new RootPage()) { BarBackgroundColor = Color.FromHex("#E5E5E2") }; } else { mainPage = new NavigationPage(new SignIn()) { BarBackgroundColor = Color.FromHex("#E5E5E2") }; } MainPage = mainPage; }