public void AddRate(CurrencyKey key, decimal rate)
{
if (!_rates.ContainsKey(key))
{
_rates.Add(key, rate);
}
}
public decimal GetRate(string fromCurrency, string toCurrency)
{
if (fromCurrency == toCurrency)
{
return(1);
}
CurrencyKey key = new CurrencyKey(fromCurrency, toCurrency);
if (_rates.ContainsKey(key))
{
return(_rates[key]);
}
throw new Exception($"Currency pair {key.FromCurrency} {key.ToCurrency} is not contained");
}
