https://www.nuget.org/packages/Siaqodb/
Siaqodb is a NoSQL embedded object and document database engine that currently runs on .NET, MonoMac, Universal Windows Platform (UWP), Xamarin.iOS, Xamarin.Android, Xamarin.Mac and Unity3D.
Siaqodb client side database may be synchronized with a Cloud/Server side database like CouchDB, MongoDB or Azure Storage.
ObjectDB and DocumentDB – objects of an object graph may be stored individually or as a single unit called document. Fully ASYNC API ACID transactions – uses a powerful storage engine: LMDB Small footprint, no extra dependencies Built-in or plug-able Encryption Support SiaqodbManager – managed stored data, run ad-hoc LINQ queries
Full LINQ provider Full POCO support Portable Class Library support Partial object loading and Eager loading May store full object graphs, Arrays, Lists, Dictionaries, etc. Thread Safe – full support for ASP.NET based apps
The latest branch is LMDB_Storage
Can be found here: https://github.com/morecraf/Siaqodb/wiki