We are consolidating our learning resources at Microsoft and will be retiring Xamarin University by June 2019. By May 2019, most certification and Xamarin.Forms courses will migrate over to Microsoft Learn where you can continue learning Xamarin for free. Check out our FAQ for details.
Short talks on common challenges.
Xamarin.Forms 3.0 Visual State Manager
Get started with the new VisualStateManager in Xamarin Forms 3.0 to control visual aspects of your UI based on defined states.