how to convert a number into roman numeral in visual C#

how convert number roman numeral in visual c#

there's no standard method this, have write it.

for example, can try (simple , recursive):

public static string toroman(int number)     {         if ((number < 0) || (number > 3999)) throw new argumentoutofrangeexception("value must between 1 , 3999");         if (number < 1) return string.empty;                     if (number >= 1000) return "m" + toroman(number - 1000);         if (number >= 900) return "cm" + toroman(number - 900); //edit: i've typed 400 instead 900         if (number >= 500) return "d" + toroman(number - 500);         if (number >= 400) return "cd" + toroman(number - 400);         if (number >= 100) return "c" + toroman(number - 100);                     if (number >= 90) return "xc" + toroman(number - 90);         if (number >= 50) return "l" + toroman(number - 50);         if (number >= 40) return "xl" + toroman(number - 40);         if (number >= 10) return "x" + toroman(number - 10);         if (number >= 9) return "ix" + toroman(number - 9);         if (number >= 5) return "v" + toroman(number - 5);         if (number >= 4) return "iv" + toroman(number - 4);         if (number >= 1) return "i" + toroman(number - 1);         throw new argumentoutofrangeexception("value must between 1 , 3999");     }

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