Update Records...How to Bulk Update?...Updating entities using a custom key from file importation is a typical scenario. Despite the ChangeTracker being outstanding to track what's modified, it lacks in term of scalability and flexibility....SaveChanges requires one database round-trip for every entity to update. So if you need to update 10000 entities, then 10000 database round-trips will be performed which is ...INSANELY... slow....StackOverflow Related Questions...Batch update/delete EF5...En...