gistfile1.txt

 public static string NumberToCurrencyText(decimal number, MidpointRounding midpointRounding)
    {
        // Round the value just in case the decimal value is longer than two digits
        number = decimal.Round(number, 2, midpointRounding);
 
        string wordNumber = string.Empty;
 
        // Divide the number into the whole and fractional part strings
        string[] arrNumber = number.ToString().Split('.');
 
        // Get the whole number text
        long wholePart = long.Parse(arrNumber[0]);
        string strWholePart = NumberToText(wholePart);
 
        // For amounts of zero dollars show 'No Dollars...' instead of 'Zero Dollars...'
        wordNumber = (wholePart == 0 ? "No" : strWholePart) + (wholePart == 1 ? " Dollar and " : " Dollars and ");
 
        // If the array has more than one element then there is a fractional part otherwise there isn't
        // just add 'No Cents' to the end
        if (arrNumber.Length > 1)
        {
            // If the length of the fractional element is only 1, add a 0 so that the text returned isn't,
            // 'One', 'Two', etc but 'Ten', 'Twenty', etc.
            long fractionPart = long.Parse((arrNumber[1].Length == 1 ? arrNumber[1] + "0" : arrNumber[1]));
            string strFarctionPart = NumberToText(fractionPart);
 
            wordNumber += (fractionPart == 0 ? " No" : strFarctionPart) + (fractionPart == 1 ? " Cent" : " Cents");
        }
        else
            wordNumber += "No Cents";
 
        return wordNumber;           
    }
 
 
    public static string NumberToText(long number)
    {
        StringBuilder wordNumber = new StringBuilder();                       
 
        string[] powers = new string[] { "Thousand ", "Million ", "Billion " };
        string[] tens = new string[] { "Twenty", "Thirty", "Forty", "Fifty", "Sixty", "Seventy", "Eighty", "Ninety" };
        string[] ones = new string[] { "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten", 
                                       "Eleven", "Twelve", "Thirteen", "Fourteen", "Fifteen", "Sixteen", "Seventeen", "Eighteen", "Nineteen" };
 
        if (number == 0) { return "Zero"; }
        if (number < 0) 
        { 
            wordNumber.Append("Negative ");
            number = -number;
        }
 
        long[] groupedNumber = new long[] { 0, 0, 0, 0 };
        int groupIndex = 0;
 
        while (number > 0)
        {
            groupedNumber[groupIndex++] = number % 1000;
            number /= 1000;
        }
 
        for (int i = 3; i >= 0; i--)
        {
            long group = groupedNumber[i];
 
            if (group >= 100)
            {
                wordNumber.Append(ones[group / 100 - 1] + " Hundred ");
                group %= 100;
 
                if (group == 0 && i > 0)
                    wordNumber.Append(powers[i - 1]);
            }
 
            if (group >= 20)
            {
                if ((group % 10) != 0)
                    wordNumber.Append(tens[group / 10 - 2] + " " + ones[group % 10 - 1] + " ");
                else
                    wordNumber.Append(tens[group / 10 - 2] + " ");                    
            }
            else if (group > 0)
                wordNumber.Append(ones[group - 1] + " ");
 
            if (group != 0 && i > 0)
                wordNumber.Append(powers[i - 1]);
        }
 
        return wordNumber.ToString().Trim();
    }
}