1st 2nd 3rd etc...

[wossname]

I have ported conipto's function to C# (mainly for my own practice really ) with a few modifications.

Its just a function that adds a suffix to a number making it look like "1st", or "657th". Negative numbers also supported

		private String AddOrdinalSuffix(int num)
		{
			//can handle negative numbers (-1st, -12th, -21st)

			int last2Digits = Math.Abs(num % 100);
			int lastDigit = last2Digits % 10;

			//the only nonconforming set is numbers ending in <...eleventh, ...twelfth, ...thirteenth> 

			return num.ToString() + "thstndrd".Substring((last2Digits > 10 && last2Digits < 14) || lastDigit > 3 ? 0 : lastDigit * 2, 2);
		}

Can this be done in less code?