Xamarin.Forms allows developers to define behavior in platform-specific projects. DependencyService then finds the right platform implementation, allowing shared code to access the native functionality.

This guide is composed of the following articles:

• Introduction – introduces the overall architecture of the DependencyService concept.
• Implementing Text-to-Speech – walks through an example of using each platform's native text-to-speech system.
• Checking Device Orientation – walks through an example of using native platform APIs to determine the device's orientation.
• Getting Battery Information – walks through an example of using native APIs to get information on the battery's status.
• Picking a Photo from the Library – walks through an example of using native APIs to pick a photo from the phone's picture library.