Open Unity3D game in Xamarin Form/ Xamarin App in Unity3D

I've developed an AR game in Unity3d. I need to open this game in Xamarin cross platform application.
1. Is it possible..?
2. how to manage the Unity assets in Xamarin...?
3. Is it possible unity game as a library and open in Xamarin...? / Xamarin app as an asset and open in Unity3D...?

Thanks in Advance..