A helper to easily set up change notifications in Entity Framework

When you use Entity Framework, you can perform Insert/Update/Delete operations on your entities, and you eventually call ObjectContext.SaveChanges() to actually make it all happen.  The call to SaveChanges() is either explicit, or can happen implicitly when you use the EntityDataSource (e.g. within a Dynamic Data application).

Before SaveChanges() actually performs the operations, it gives you a chance to look at the entities, letting you modify them, and possibly cancel...Full Article.