using System;
public class Program
{
public static void Main()
int aNumber = 3;
Console.WriteLine(aNumber.DigitToWord());
}
// I'd like the int class to have a new method
public static class IntExtension
public static string DigitToWord(this int i)
string word;
switch(i)
case 0: word = "zero";
break;
case 1: word = "one";
case 2: word = "two";
case 3: word = "three";
case 4: word = "four";
case 5: word = "five";
case 6: word = "six";
case 7: word = "seven";
case 8: word = "eight";
case 9: word = "nine";
default: word = "out of range";
return word;
