Preface

Xamarin released the Xamarin.Forms toolkit in the summer of 2014, and it has since become a very popular framework for .NET mobile app developers. On the surface, Xamarin.Forms is a user interface toolkit focused on abstracting the platform-specific UI APIs of iOS, Android, and Windows into a single easy-to-use set of APIs. In addition, Xamarin.Forms also provides the common components of a Model-View-ViewModel (MVVM) framework, making it extremely easy and intuitive to bind data to a user interface.

Xamarin.Forms comes with several building blocks that are paramount to a solid mobile app architecture, such as dependency injection and inversion of control, messaging, and navigation. However, many apps will quickly outgrow these "in the box" capabilities and require the use of more advanced and sophisticated replacements. This book will show you how to leverage the strengths of the Xamarin.Forms toolkit while complementing it with popular patterns and libraries to achieve a more robust and sustainable app architecture.

As with any framework or toolkit, there are specific scenarios that it makes more sense for than others. Xamarin has done a great job of providing guidance and recommendations on when the use of Xamarin.Forms is appropriate versus when it might be a better decision to use the core Xamarin platform. Once you have made the decision to use Xamarin.Forms, this book will help guide you through using patterns and best practices with your Xamarin.Forms mobile app by walking you through an end-to-end example.