In this chapter, we will take a look at the Model-View-ViewModel (MVVM) pattern, the MVVM elements that are offered with the Xamarin.Forms toolkit, and how we can expand on them to truly take advantage of the power of the pattern. As we dig into these topics, we will apply what we have learned to the TripLog app that we started building in Chapter 1, Getting Started.

In this chapter, we will cover the following topics:

• Understanding the MVVM pattern and data binding
• MVVM in the Xamarin.Forms toolkit
• Adding the MVVM pattern and data binding to the Xamarin.Forms mobile app created in Chapter 1, Getting Started