My code samples for the Cross-platform mobile dev Meetup in Paris, France, January 2018
You can see the details and the slides here:
http://www.galasoft.ch/presentations/2018005
A small HTTP Triggered Azure Function, showing how a simple function can be created and published from Visual Studio.
A Xamarin.Forms client for the LbCalculator function.
In addition, you may want to check the CoinValue sample which shows a more complex Azure Function and the corresponding Xamarin client, implemented for iOS, Android and Windows 10 UWP.