public CCustomer AddCustomer(string name, string surname, int id)
{
CCustomer c = new CCustomer(name, surname, id);
this.customers.Add(c);
return(c);
}
public void StoreAccount(int id, int ownerID)
{
CAccount acc = new CAccount(id, ownerID);
this.accounts.Add(acc);
CCustomer c = GetCustomer(ownerID);
c.AddAccount(acc);
}