[C#-1.5.11] SpellNumbers

/*Write a program that converts a number in the range [0...999] to a text corresponding to its English pronunciation. Examples:
    0  "Zero"
    273  "Two hundred seventy three"
    400  "Four hundred"
    501  "Five hundred and one"
    711  "Seven hundred and eleven"
*/
using System;

class SpellNumber
{
    static void Main()
    {
        int number = int.Parse(Console.ReadLine());

        int tens = number % 100;
        int hundreds = number /100;
        int units = tens %10 ;

        string[] specials1 = {"Zero", "One", "Two", "Three", "Four", "Five", "Six", "Seven",
                            "Eight", "Nine", "Ten", "Eleven", "Twelve", "Thirteen", "Fourteen",
                            "Fifteen", "Sixteen", "Seventeen", "Eighteen", "Nineteen"};
        string[] specials2 = {"Twenty", "Thirty", "Forty", "Fifty", "Sixty", "Seventy", "Eighty", "Ninety"};

        if ((number >=0) && (number <=19))
        {
            Console.WriteLine(specials1[number]);
        }
        else if ((number >= 20) && (number <= 99))
        {
            Console.WriteLine("{0} {1}", specials2[tens - 2], specials1[units]);
        }
        else if ((number >= 100) && (number <= 999))
        {
            Console.Write("{0} hundred ", specials1[hundreds]);

            if ((number % 100 > 0) && (number % 100 <= 19))
            {
                Console.Write("and {0}", specials1[tens]);
            }
            else
            {
                Console.Write("and {0} ", specials2[tens/10 - 2]);
            }

            if ((tens % 10 > 0) && ( tens % 10 <= 9))
            {
                Console.WriteLine("{0}", specials1[units]);
            }
        }
    }
}