Entity Framework (EF) is an open source object-relational mapping (ORM) framework for ADO.NET, was a part of .NET Framework, but from Entity framework version 6 it is separated from .NET framework.
The Entity Framework is a set of technologies in ADO.NET that support
the development of data-oriented software applications. Architects and
developers of data-oriented applications have typically struggled with
the need to achieve two very different objectives. They must model the
entities, relationships, and logic of the business problems they are
solving, and they must also work with the data engines used to store and
retrieve the data. The data may span multiple storage systems, each
with its own protocols; even applications that work with a single
storage system must balance the requirements of the storage system
against the requirements of writing efficient and maintainable
application code.
The Entity Framework enables developers to work with data in the form
of domain-specific objects and properties, such as customers and
customer addresses, without having to concern themselves with the
underlying database tables and columns where this data is stored. With
the Entity Framework, developers can work at a higher level of
abstraction when they deal with data, and can create and maintain
data-oriented applications with less code than in traditional
applications. Because the Entity Framework is a component of the .NET
Framework, Entity Framework applications can run on any computer on
which the .NET Framework (starting with version 3.5 SP1) is installed read more.
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