Number to Text in console Program

namespace Number2Text01
{
    class Program
    {
        static string str;
        static void Main(string[] args)
        {
            Console.Write("\n Enter Three Digit number::");
            int amt = int.Parse(Console.ReadLine());
            int temp,i;
          //static string str;
            string[] Hundreds = new string[] { "One Hundred", "Two hundred", "Three Hundreds", "Four Hundreds", "Five hundred", "Six hundred", "Seven Hundreds", "Eight hundred", "Nine hundred" };
            string[] Tens = new string[] { "", "Ten", "Twenty", "Thirty", "Fourty", "Fifty", "Sixty", "Seventy", "Eight", "Ninty" };
            string[] Ones = new string[] {"","One","Two","Three","Four","Five","Six","Seven","Eight","Nine" };
                        
            int[] arr = new int[3];
            temp=amt;
            i = 0;
            while (temp != 0)
            {
                arr[i] = (temp % 10);
                temp = temp / 10;
                i++;
            }
            i -= 1;
            while (i != -1)
            {
                if (i == 2)
                    str = Hundreds[arr[i]-1];
                if (i == 1)
                    str += " and " + Tens[arr[i]];
                if (i == 0)
                    str +=" " + Ones[arr[i]];                            
                i--;
            }
            Console.WriteLine("\n\t Given number is "+amt+" and the Text is  "+str);
            Console.Read();
        }
    }
}