Xamarin: Cross-Platform Mobile Application Development

Implementing Inversion of Control

You might be asking yourself at this point in time, how do I switch out different classes such as the ISettings example? Inversion of Control (IoC) is a design pattern meant to complement dependency injection and solve this problem. The basic principle is that many of the objects created throughout your application are managed and created by a single class. Instead of using the standard C# constructors for your ViewModel or Model classes, a service locator or factory class will manage them throughout the application.

There are many different implementations and styles of IoC, so let's implement a simple service locator class to use through the remainder of this module as follows:

public static class ServiceContainer ...