public static void _main()
{
WriteLine("Enter a currency pair like 'EURUSD' to get a quote, or 'q' to quit");
for (string input; (input = ReadLine().ToUpper()) != "Q";)
WriteLine(FxApi.GetRate(input).Map(Decimal.ToString)
.Recover(ex => ex.Message).Result); // what to do in case of failure
}
public static void _main()
{
Retry(10, 100, () => FxApi.GetRate("GBPUSD"));
}