BeFriend.Views.FirstTimeTutorial.AddTwitterButton_OnClick C# (CSharp) Метод

        private void AddTwitterButton_OnClick(object sender, RoutedEventArgs e)
        {
            var frame = Window.Current.Content as Frame;
            frame?.BackStack.Add(new PageStackEntry(typeof(FirstTimeTutorial), null, null));
            frame?.Navigate(typeof(TwitterAuthenticator));
        }