2.1 What are UI design patterns?
2.2 MVVM—the design pattern for Xamarin apps
2.3 What is cross-platform code?
2.3.1 .NET Standard class libraries
2.4 Getting started—creating your first solution
2.4.1 Requirements—what hardware or software do you need for each mobile platform?
2.4.2 Creating the solution
2.4.3 What have we just created?
2.4.4 Building and running the apps
2.5 Is this really a cross-platform app?