public Account(string owner)
{
_owner = owner;
_state = new SilverState(0.0, this);
}
public SilverState(AccountState state) :
this(state.Balance, state.Account)
{
}
public GoldState(AccountState state)
: this(state.Balance, state.Account)
{
}
public RedState(AccountState state)
{
this.balance = state.Balance;
this.account = state.Account;
Initialize();
}