public void Cleanup()
{
DC = null;
DM = null;
DS = null;
person = null;
location = null;
stationaryNumber = null;
mobileNumber = null;
contact = null;
}
public void Startup()
{
DC = new DataContext(server, database);
DM = new DataManagement(DC);
DS = new DataService(DM);
location = new Location(city, zipCode);
person = new Person(name, surname, location);
stationaryNumber = new StationaryPhoneNumber(sNumber);
mobileNumber = new MobilePhoneNumber(mNumber);
contact = new Contact(person, mobileNumber);
}