Deleting a child entity in a many-to-one relationship using POCO in EF4 CTP5?

If it's an option in your application's architecture you might consider enabling Dynamic Proxies on your entities. This enables the context to create a subclass of your entity, that overrides your properties to track changes. In your case, this will delete rows corresponding to your object when the object loses it's references (assuming you call SaveChanges() on the context).

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