How does Dependency Injection improve testability in Xamarin apps?

Dependency Injection decouples components, making them easier to mock and test independently.

DI allows Xamarin apps to invert control by injecting dependencies instead of hardcoding them. This enables unit testing by replacing real implementations with mocks or stubs. In MVVM-based apps, ViewModels depend on interfaces rather than concrete services. DI containers like Microsoft.Extensions.DependencyInjection manage object lifetimes and resolve dependencies automatically.