Return the uniqueidentifier with entity framework

I am using Entity Framework 3.5, while inserting a record i want to return the unique identifier with entity framework.开发者_如何学C How to do that?

---

After calling savechages the new id will be stored in the entity. so you can retrieve from the entity.

---

More generally, "To ensure that objects on the client have been updated by data source-side logic, you can call the Refresh method with the StoreWins value after you call SaveChanges.", per MSDN.

http://msdn.microsoft.com/en-us/library/bb738618.aspx

---

One way that I have taken to working is, when sending a record to my DataLayer/Business Logic Layer, is to have the DL/BLL do the update/insert, then retrieve the record back from the DB and return it with a boolean indicating success or failure.

That way, I can immediately refresh the record in the interface with the written one so I can be sure the record actually went in how it should have.