C# or windows equivalent of OS X's Core Data?

I'm late to the boat and have only just now started using Core Data in OS X / Cocoa - it's incredible and is really changing the way I look at things.

Is there an equivalent technology in C# or the modern Windows frameworks? i.e. having managed data types where you get saving, data management, deleting, searching all for free?

Also wondering if there's anything like this on Linux.