.NET Object Database of Specific Features [closed]

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Anybody knows of a .NET object database that has the following:

1. embedded thread-safe transactional ACID operations (read/write/delete)
2. full LINQ support (and better PLINQ as well)
3. transparent lazy fetching of referenced objects (no need to inherent or implement anything)
4. indexing, advanced strings and collections/generics built-in support
5. clean/modern API actively developed