OptimisticConcurrencyException Does Not Work in Entity Framework In Certain Situations

Question

UPDATE (2010-12-21): Completely rewrote this question based on tests that I\'ve been doing. Also, this used to be a POCO specific question, but it turns out that my

Answer 1

If it's EF Code first, then use code similar to below code. This will change the original TimeStamp loaded from db to the one from UI and will ensure OptimisticConcurrencyEception occurs.

db.Entry(request).OriginalValues["Timestamp"] = TimeStamp;