Xamarin.iOS 6.4 brought async/await support to iOS devices. Apart from supporting the idiom with the Mono 3.0 compiler, Xamarin also invested into adding awaitable versions of all long-running calls in Apple’s iOS API. One of my favorites is
UIView.AnimateAsync()
taking an Action or lambda to animate asynchronously without blocking the UI thread.
The fun begins when you use this to chain animations. Here’s an example of doing a horizontal shake animation that could be used to indicate an invalid entry: