As I posted in a comment to another question, I have some dependency problems. I could not update Xamarin.Forms to the latest version which has Pull To Refresh, because Acr.UserDialogs needs Xamarin Android Support v4 with version 23.0.1, and the newese Xamarin.Forms needs a newer version.
Is there an alteative to Acr.UserDialogs which I can use with newer Xamarin.Forms?