Error:A referential integrity constraint violation occurred on db.SaveChanges() in .net?

Question

I have a created a WPF application with Entity framework 4.0. When i am trying to insert record in PhoneNumber Table it inserts first record succes

Answer 1

You instantiate phnumber only once and then try to insert it in the database multiple times. Move the PhoneNumber phnumber = new PhoneNumber(); phrase inside the foreach (var ph in phoneList) Block.