Tuesday, July 30, 2013

: One to many relationship and ObjectStateManager error

Understand basic navigation with Entity Framework Code First (4.3) with 1 to many relationship


Entity Framework 4.3: An object with the same key already exists in the ObjectStateManager
http://patrickdesjardins.com/blog/entity-framework-4-3-an-object-with-the-same-key-already-exists-in-the-objectstatemanager

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