What is the difference between writting class using Code First approch or POCO?

EF and ORM.

I recently realized that is possible using 开发者_开发百科POCO to have clean classes not plumbed with EF auto generated code.

I saw the new release of EF 4.1 and the use of Code First approach and DbContext.

My questions:

• What is the difference between Code First approach and Poco approach?
• Can we use Code First (DbContext and DbSet) instead of POCO + Repository pattern?

Thanks for your time on this.

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They're completely different things, and you can use them together.

POCO means that your entity classes are "normal" classes, not dependent on any specific ORM layer.

A DbContext is an object that enables you to access the database in an object-oriented way (like ObjectContext in earlier versions of EF).

Have a look at this tutorial for examples.