protected override void OnCreate(Bundle savedInstanceState)
 {
     base.OnCreate (savedInstanceState);
     // Create your application here
     SetContentView (Resource.Layout.ActivityFragmentLayout);
     var developerOptionsFragment = new DeveloperOptionsFragment ();
     var ft = FragmentManager.BeginTransaction ();
     ft.Add (Resource.Id.fragment_container, developerOptionsFragment);
     ft.Commit ();
 }
        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            // Create your application here
            SetContentView(Resource.Layout.ActivityFragmentLayout);
            var developerOptionsFragment = new DeveloperOptionsFragment();
            var ft = FragmentManager.BeginTransaction();

            ft.Add(Resource.Id.fragment_container, developerOptionsFragment);
            ft.Commit();
        }