public App() { OAuthSettings = new OAuthSettings( clientId: FacebookClientId, scope: "user_birthday,user_friends,user_about_me,user_status,user_posts,email,public_profile", authorizeUrl: "https://m.facebook.com/dialog/oauth/", redirectUrl: "http://www.facebook.com/connect/login_success.html"); AppUsers = InitializeUsers(); HomePage = new HomePage(); NavPage = new NavigationPage(HomePage); // The root page of your application MainPage = NavPage; }