System.Globalization.FormatProvider.Number.FormatScientific C# (CSharp) Method

            private static unsafe void FormatScientific(StringBuilder sb, NumberBuffer number, int nMinDigits, int nMaxDigits, NumberFormatInfo info, char expChar)
            {
                char* dig = number.digits;

                sb.Append((*dig != 0) ? *dig++ : '0');

                if (nMaxDigits != 1) // For E0 we would like to suppress the decimal point
                    sb.Append(info.NumberDecimalSeparator);

                while (--nMaxDigits > 0)
                    sb.Append((*dig != 0) ? *dig++ : '0');

                int e = number.digits[0] == 0 ? 0 : number.scale - 1;
                FormatExponent(sb, info, e, expChar, 3, true);
            }