Converting integers to roman numerals

Question

I\'m trying to write a function that converts numbers to roman numerals. This is my code so far; however, it only works with numbers that are less than 400. Is there a quick

Answer 1

I find BrunoLM's code very simple and elegant but the From(...) function really needs to check if the source is a valid roman numeral.
Something like this

public static bool IsValidRomanNumber(string source) {
        bool result = true;

        string[] invalidCouples = { "VV", "LL", "DD", "VX", "VC", "VM", "LC", "LM", "DM", "IC", "IM", "XM" };

        foreach (string s in invalidCouples) {
            if (source.Contains(s)) {
                result = false;
                break;
            }
        }

        return result;
    }