How can I implement DBSet.AddOrUpdate in Entity Framework 4.4?

Question

In response to Slauma\'s answer to my question about running applications that use EF on Windows XP I am converting my application back from Entity Framework 5.0 to use Entit

Answer 1

You must add...

using System.Data.Entity.Migrations;

...to your code file to have AddOrUpdate available. It is an extension method of IDbSet that is implemented in the IDbSetExtensions class in System.Data.Entity.Migrations namespace.