In the Xamarin SDK we have platform independent projects and platform specific projects implementing functions that must use platform-specific features.

We need a way to be able to reference platform specific implementation from shared code without a hard dependency, so that we can do a sort of "write once, run everywhere".

The idea is that shared projects host the interface definition of the service, while platform projects will host the concrete implementation.

When the feature will be ready, the user must be able to get the platform specific implementation with the following code:

MobileCore.GetInstance<IMyServiceInterface>();