private void TellMeMore() { var view = new UpgradeViewController(); view.NavigationItem.LeftBarButtonItem = new UIBarButtonItem { Image = Images.Cancel }; view.OnActivation(d => d(view.NavigationItem.LeftBarButtonItem.GetClickedObservable() .Subscribe(_ => view.DismissViewController(true, null)))); PresentViewController(new ThemedNavigationController(view), true, null); }