Microsoft.Scripting.Math.BigInteger.IsNegative C# (CSharp) Method

    public bool IsNegative() {
      return sign < 0;
    }

        private static string ToBinary(BigInteger val, bool includeType, bool lowercase) {
            Debug.Assert(!val.IsNegative());

            string digits;
            digits = ToDigits(val, 2, lowercase);
            
            if (includeType) {
                digits = (lowercase ? "0b" : "0B") + digits;
            }
            return digits;
        }