public Account(int id, string Owner, int bal)
{
this.ID = id;
this.owner = owner;
this.openingDate = DateTime.Now;
this.operations = new List <Operation>();
this.balance = bal;
this.InterestRate = new GoldInterest();
}
public Account(IntresetRateMechanism itr)
{
this.InterestRateMechanism = itr;
}