title: C# Windows Phone 8.1 Twitter Authentication Page Not Changing
body: <p>I have the following c# code for windows phone 8.1 to authenticate user login via twitter. </p>
  
  <p>openTwitterPage is the Button event when user clicks login on the home page.</p>
  
  <p>After the user enter his login credentials on twitter page and clicks sign in, my homepage is shown again and the Frame.Navigate code is never executed.</p>
  
  <pre><code>    private async void openTwitterPage(object sender, RoutedEventArgs e)
      {
          await Authenticate();
          this.Frame.Navigate(typeof(MainMenu));
      }
  
      private async System.Threading.Tasks.Task Authenticate()
      {
          user = await  App.MobileService.LoginAsync(MobileServiceAuthenticationProvider.Twitter);
      }
  </code></pre>