public override bool OnCreateOptionsMenu(ActionBar_Sherlock.View.IMenu menu) { base.OnCreateOptionsMenu (menu); var isLoggedIn = ParseUser.CurrentUser != null; var loginLogoutResourceText = isLoggedIn ? Resource.String.logoutMenuItem : Resource.String.loginMenuItem; menu.Add (0, AppConstants.LoginLogoutMenuItemId, 100, loginLogoutResourceText); return true; }