How is Entity Framework 4's POCO support compared to NHibernate?

Posted by Kevin Pang on Stack Overflow See other posts from Stack Overflow or by Kevin Pang
Published on 2010-04-15T17:55:31Z Indexed on 2010/04/15 18:13 UTC
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entity-framework

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nhibernate

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orm

Just wondering if anyone has had any experience using Entity Framework 4's POCO support and how it stands up compared to NHibernate. If they're the same, I'd be very interested in making Entity Framework 4 my ORM of choice if only because it would:

Support both data first AND object first development
Have a robust LINQ provider
Be easier to pitch to clients (since it's developed by Microsoft)
Come baked into the .NET framework rather than requiring 8 dlls to get up and running

In other words, are there any major shortcomings to EF4? Does it support all of the basic functionality NHibernate supports (lazy-loading, eager-loading, 1st level caching, etc.) or is it still rough around the edges? Is the syntax for setting up the mappings as easy as NHibernate and/or Fluent NHibernate?

Edit: Please don't bring up the vote of no confidence. That was ages ago and dealt with some serious shortcomings of EF1 that really don't seem to apply anymore to EF4.

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