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Editorial Team
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Asked: 2026-05-14T01:11:14+00:00

I have run into my first dissapointment with Entity Framework 4. It turns out

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I have run into my first dissapointment with Entity Framework 4. It turns out that SQL CE, when used with EF4, does not support autogenerated primary keys. I get a System.Data.UpdateException from OnjectContext.SaveChanges() with this message:

Server-generated keys and server-generated values are not supported by SQL Server Compact.

So, now I have to manually generate keys for my entities. Assuming I want to use auto-incremented integer keys, what is the best way to go about generating and keeping track of the keys when using Entity Framework? Thanks for your help.

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  1. Editorial Team

    At the bottom of the link in your question is a suggested solution. See SQL Compact, Identity Columns and Entity Framework perhaps you might want to implement an extension method like the one outlined.

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