Convert Amount Into Words / Number into words

// Calling Function
  string a = commonobj.ConvertNumerictoWords("21545.456");
               Output is = TWENTY ONE THOUSAND FIVE HUNDRED  FORTY FIVE DIHRAM AND FOUR HUNDRED  FIFTY SIX FILLS ONLY

//In Toggle style
  string b=System.Threading.Thread.CurrentThread.CurrentCulture.TextInfo.ToTitleCase(a.ToLower());
        Output is =Twenty One Thousand Five Hundred  Forty Five Dihram And Four Hundred  Fifty Six Fills Only


 public string ConvertNumerictoWords(string Values)
    {
        String number = "ZERO";
        string Floats = "ZERO";
        if (Values.Contains("."))
        {
            bool isNum;
            double retNum;
            isNum = Double.TryParse(Values, System.Globalization.NumberStyles.Any, System.Globalization.NumberFormatInfo.InvariantInfo, out retNum);
            if (isNum == true)
            {
                string[] Text = Values.Split('.');
                number = ConvertNumbertoWords(Convert.ToInt32(Text[0].ToString()));
                Floats = ConvertNumbertoWords(Convert.ToInt32(Text[1].ToString()));
            }
            else
                return "Amount is not Valid!";
        }
        else
        {
            bool isNum;
            double retNum;
            isNum = Double.TryParse(Convert.ToString(Values), System.Globalization.NumberStyles.Any, System.Globalization.NumberFormatInfo.InvariantInfo, out retNum);
            if (isNum == true)
            {
                number = ConvertNumbertoWords(Convert.ToInt32(Values));
            }
            else
                return "Amount is not Valid!";
        }
        return number + " DIHRAM AND " + Floats + " FILLS ONLY";
    }






 // Convert Number into Words


   public string ConvertNumbertoWords(int number)
    {
        if (number == 0)
            return "ZERO";
        if (number < 0)
            return "minus " + ConvertNumbertoWords(Math.Abs(number));
        string words = "";
        if ((number / 1000000) > 0)
        {
            words += ConvertNumbertoWords(number / 1000000) + " MILLION ";
            number %= 1000000;
        }
        if ((number / 1000) > 0)
        {
            words += ConvertNumbertoWords(number / 1000) + " THOUSAND ";
            number %= 1000;
        }
        if ((number / 100) > 0)
        {
            words += ConvertNumbertoWords(number / 100) + " HUNDRED ";
            number %= 100;
        }
        if (number > 0)
        {
            if (words != "")
                words += " ";
            var unitsMap = new[] { "ZERO", "ONE", "TWO", "THREE", "FOUR", "FIVE", "SIX", "SEVEN", "EIGHT", "NINE", "TEN", "ELEVEN", "TWELVE", "THIRTEEN", "FOURTEEN", "FIFTEEN", "SIXTEEN", "SEVENTEEN", "EIGHTEEN", "NINETEEN" };
            var tensMap = new[] { "ZERO", "TEN", "TWENTY", "THIRTY", "FORTY", "FIFTY", "SIXTY", "SEVENTY", "EIGHTY", "NINETY" };

            if (number < 20)
                words += unitsMap[number];
            else
            {
                words += tensMap[number / 10];
                if ((number % 10) > 0)
                    words += " " + unitsMap[number % 10];
            }
        }
        return words;
    }