Microsoft.Scripting.Utils.MathUtils.BigIntegerToString C# (CSharp) Method

        internal static string BigIntegerToString(uint[] d, int sign, int radix, bool lowerCase) {
            if (radix < 2) {
                throw ExceptionUtils.MakeArgumentOutOfRangeException("radix", radix, "radix must be >= 2");
            }
            if (radix > 36) {
                throw ExceptionUtils.MakeArgumentOutOfRangeException("radix", radix, "radix must be <= 36");
            }

            int dl = d.Length;
            if (dl == 0) {
                return "0";
            }

            List<uint> digitGroups = new List<uint>();

            uint groupRadix = groupRadixValues[radix];
            while (dl > 0) {
                uint rem = div(d, ref dl, groupRadix);
                digitGroups.Add(rem);
            }

            StringBuilder ret = new StringBuilder();
            if (sign == -1) {
                ret.Append("-");
            }

            int digitIndex = digitGroups.Count - 1;

            char[] tmpDigits = new char[maxCharsPerDigit[radix]];

            AppendRadix((uint)digitGroups[digitIndex--], (uint)radix, tmpDigits, ret, false, lowerCase);
            while (digitIndex >= 0) {
                AppendRadix((uint)digitGroups[digitIndex--], (uint)radix, tmpDigits, ret, true, lowerCase);
            }
            return ret.Length == 0 ? "0" : ret.ToString();
        }