private Transfer MakeTransferWithAmountWithinLimit(string counterAccount, Money amount)
{
int sum = Accounts.CalculateSum(counterAccount);
if (sum % 11 == 0)
{
// 3. Look up counter account and make transfer object:
CheckingAccount acct = Accounts.FindAcctByNumber(counterAccount);
Transfer result = new Transfer(this, acct, amount);
return(result);
}
else
{
throw new BusinessException("Invalid account number!");
}
}
private Transfer MakeTransferWithValidAccountNumber(string counterAccount, Money amount)
{
int sum = Accounts.CalculateSum(counterAccount);
if (sum % 11 == 0)
{
// 2. Look up counter account and make transfer object:
CheckingAccount acct = Accounts.FindAcctByNumber(counterAccount);
Transfer result = new Transfer(this, acct, amount); // <2>
// 3. Check whether withdrawal is to registered counter account:
if (result.CounterAccount.Equals(this.RegisteredCounterAccount))
{
return(result);
}
else
{
throw new BusinessException("Counter-account not registered!");
}
}
else
{
throw new BusinessException("Invalid account number!!");
}
}