Android, iOS and Windows Phone + SQLite (ORM)

That such a very good afternoon.

How can implement SQLite (ORM) projects Android, iOS and Windows Phone?

Working with Visual Studio.

The idea is to share the code in the three platforms, that is, the data layer, layer of web services, application layer, etc. and implement the references on each platform.

I have tried using PCL's, but the problem is that there are incompatibilities with Windows Phone using SQLite (ORM). In this way I create an empty solution in order to create the layers (PCL's)

I'm trying to use the alternative 'Xamarin Forms', but I see that the implementation of SQLite is on the platform (eg Android) and not on the shared application.

Likewise if you are or know of an external manual Xamarin to solve these doubts.

Thanks in advance.

Greetings.