public PersonAddress(PersonAddress pa)
 {
     this.BuldName   = pa.BuldName;
     this.StreetName = pa.StreetName;
 }
 public Person(Person p)
 {
     this.PersonName    = p.PersonName;
     this.Surname       = p.Surname;
     this.personAddress = (PersonAddress)p.personAddress.Clone();
 }