What is DependencyService in Xamarin.Forms and how does it work?
Updated May 6, 2026
Short answer
DependencyService allows Xamarin.Forms apps to access platform-specific functionality through a shared interface.
Deep explanation
DependencyService is a built-in Xamarin.Forms mechanism that enables dependency injection-like behavior for accessing native platform APIs. Since Xamarin.Forms shares code across platforms, certain features (like GPS, camera, or file storage) require platform-specific implementations. DependencyService works by defining an interface in the shared project and implementing it separately in Android and iOS projects. At runtime, Xamarin resolves the correct implementation based on the platform using the [assembly: Dependency] attribute.
Real-world example
A weather app uses DependencyService to access device GPS location differently on Android and iOS while keeping shared UI logic intact.
Common mistakes
- Forgetting to register implementation with Dependency attribute
- assuming it works like full DI container
- overusing DependencyService instead of modern DI frameworks.
Follow-up questions
- What are alternatives to DependencyService?
- Is DependencyService still recommended?