How to load a View again after getting back to the current Activity in Xamarin Android?

I have the below OnCreate method which loads a transparent View

 protected override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);

        testView = new TestView(this);

        SetContentView(testView);

    }

however when I start another activity and return back to the current activity the View does not show

I have read the Activity Lifecycle, but how to start the View again after returning to the Current Activity