Now that we have our model layer implemented, we can move on to write the ViewModel layer. The ViewModel will be responsible for presenting each operation to the UI and offering properties to be filled out by the View layer. Other common responsibilities of this layer are input validation and simple logic to display busy indicators.
At this point, it would be a good idea to include the
ServiceContainer class from the previous chapter in our
XamSnap PCL project, as we will be using it through our ViewModels to interact with the Model layer. We will be using it as a simple option to support dependency injection and Inversion of Control; however, you may use another library of your preference for this.
Normally, we start ...