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+1  Q: 

How do I create a One-to-One relationship in Entity Framework 4

I am struggling to create a One-to-One relationship in EF4.I keep getting errors like this:

Each of the following columns in table XXX is mapped to multiple conceptual side properties: XXX.Id is mapped to <XXXYYY.YYY.YYYId, XXXYYY.XXX.Id>

Given I have a classes Person and PersonDetail that relate to tables of the same name, and the Id's are the same in both tables (I think EF4 assumes this as default?) What do I do in my edmx files to define this relationship?

I only need Person have a PersonDetail property, not the other way round.

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