Example of a disconnected database in c#

[BrenOS]

Does anyone have an example of a disconnected database in C# with ADO.NET?

The database itself doesnt matter, only have some basic functionality I can look at.

Thanks

 

[BrenOS]

A database that can work on a local replica and then update at a chosen time to a central store.

It's not greatly important, but would be nice if I could take a look at a functional one, have googled for good long while but turned up nothing.