Question

I have the following extension method

public static bool IsValidCurrency(this string value)
{
    CultureInfo culture = new CultureInfo ("en-gb");
    decimal result;
    return decimal.TryParse(value, NumberStyles.Currency, culture, out result);
}

I wish to have this to be culturally neutral allowing to pass $ , €, ¥ etc. into the method

Thanks

Answer 1

Different cultures may use the same currency symbol to mean different things. Hence there is no invariant way to read a currency.

It could however be done in the following way:

public static bool IsValidCurrency(this string value)
{       
    decimal result;
    var cultures = CultureInfo.GetCultures(CultureTypes.SpecificCultures);
    return cultures.Any(info => Decimal.TryParse(value, NumberStyles.Currency, info, out result));
}