Hello ,
Entity Framework maps (Abstracts ) your "Relational data model" into A fully Object Oriented "Conceptual Model" and provides services that enable this model to be Queried, Retrieved, Modified and Persisted back again into its relational storage and retrieved back again.
Its an ORM technology like NHibernate.
You can also refer Programing with Entity Framework book to get clear and basic to pro. level understanding.
You can find more information here :
http://msdn.microsoft.com/en-us/library/aa697427%28v=vs.80%29.aspx
Best Regards,
Rohan Laghate
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