public void Create(IEnumerable <CustomerDTO> customers)
 {
     foreach (var customer in customers)
     {
         _repositry.Save(new Customer(customer.FirstName, customer.LastName));
         _emailFormatter.CreateMessage(customer.Email);
     }
 }
 public void Create(IEnumerable <CustomerDTO> customerDTOs)
 {
     foreach (var item in customerDTOs)
     {
         customerRepository.Save(new Customer()
         {
             FirstName = item.FirstName, LastName = item.LastName
         });
         emailFormatter.CreateMessage(item.Email);
     }
 }