//public virtual bool NameStyle { get; set; } // ???
 //public virtual string CompanyName { get; set;  }
 //public virtual string SalesPerson { get; set; }
 public void change_email_to(EmailAddress email)
 {
     this._email = email;
 }
 public Customer(Name name, Address address, EmailAddress email)
 {
     this._email = email;
     _name = name;
     _address = address;
 }