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    <p>I tried using it for my current project, which basically involves rewriting our current mess of a data layer.</p> <p>It just doesn't work.</p> <p>First, if you're trying to base an Entity off of a View, the designer tries to force every NOT NULL property to be an entity key... which is pretty much never what I wanted. To work around that you have to edit the xml in at least two places, and do it every time you add an object because it refreshes and re-adds the EntityKey properties. <a href="https://stackoverflow.com/questions/941826/must-specify-mapping-for-all-key-properties-in-entity-framework">Must specify mapping for all key properties in Entity Framework?</a></p> <p>Second, when you are creating associations you MUST use every entity key - <a href="https://stackoverflow.com/questions/946578/how-can-you-make-an-association-without-using-all-entity-keys-in-entity-framework">How can you make an association without using all entity keys in entity framework?</a></p> <p>Those two things held me up for 3 days, then I went back to Linq to SQL and had it done in a couple hours. (Well, at least the part of the system I was struggling with... ) I don't know if those are in the Vote of No Confidence, but it's just not ready in my opinion.</p> <p>Also with the lack of answers I got here on every EF question I've asked, I have to assume current usage is so low that getting help and support is going to be difficult... which is possibly the BIGGEST reason not to use something. </p> <p>Let's hope the next version is better...</p> <p>EDIT: OUr current plan is to stick with Linq 2 SQL (I have to finish a project by Friday) and then evaluate all the other ORMs to see if anything else is better. The other developer hates L2S for the record, but I've never had any major problems using it...</p>
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    1. POWould you use v3.5 of the ADO.NET Entity Framework, or wait for v4.0?
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