title: Xamarin.forms maps offline
body: <p>I want to use xamarin.forms maps offline with google maps.</p>
  
  <p>I know how to do it in xamarin for android - using MapTypeNone, and loading the my own TileProvider.</p>
  
  <p>Is there a way to do it also in xamarin.forms instead of using different code for android and IOS ?</p>