private void Seed() { using (var context = new ShopsContext(ContextOptions)) { context.Database.EnsureDeleted(); context.Database.EnsureCreated(); var shop = new Shop() { Id = Guid.NewGuid(), Name = "Aldi", Products = new List <Product>() { new Product() { Name = "pomme", Price = 5 } } }; context.AddRange(shop); context.SaveChanges(); } }