public void SaveUser(User user) { Mapper.CreateMap<User, Users>(); var users = Mapper.Map<User, Users>(user); using (var rng = new RNGCryptoServiceProvider()) { byte[] data = new byte[4]; // Ten iterations. for (int i = 0; i < 10; i++) { // Fill buffer. rng.GetBytes(data); // Convert to int 32. int value = BitConverter.ToInt32(data, 0); Console.WriteLine(value); } } using (var entities = new anmatiEntities()) { if (user.Id != 0) { entities.Users.Attach(users); } else { entities.Users.Add(users); } entities.SaveChanges(); } }