public AmountCurrency Sum(AmountCurrency amountCurrency)
{
if (amountCurrency.Currency != this.Currency)
{
throw new InvalidOperationException("Cannot sum different currencies");
}
else
{
return(new AmountCurrency(
amountCurrency.Amount + this.Amount,
this.Currency.ToString()));
}
}
public void AddDebtAmount(AmountCurrency debtAmount)
{
//Check if this currency exists in the DebtByCurrency list
var debtItem = DebtAmountsByCurrency.FirstOrDefault(x => x.Currency == debtAmount.Currency);
if (debtItem != null)
{
debtItem.Amount += debtAmount.Amount;
}
else
{
//If no amount with this currency has been added yet,
//create a new item and add this amount
DebtAmountsByCurrency.Add(new AmountCurrency(debtAmount.Amount, debtAmount.Currency.Value));
}
}