Goedel.Cryptography.Secret.CombineNK C# (CSharp) Method

        static byte[] CombineNK(KeyShare[] Shares) {
            
            var Threshold = Shares[0].Threshold;
            if (Shares.Length < Threshold) throw new Throw("Not Enough Shares");

            var Modulus = BigInteger.Pow(2, 129) - 25;
            BigInteger Accum = 0;

            //Console.WriteLine("Modulus = {0} ", Modulus);


            for (var Formula = 0; Formula < Threshold; Formula++) {

                var Value = Shares[Formula].Value;
                //Console.WriteLine("Value = {0} ", Value);

                BigInteger Numerator = 1, Denominator = 1;
                for (var Count = 0; Count < Threshold; Count++) {
                    if (Formula == Count) continue;  // If not the same value
                    var Start = Shares[Formula].Index;
                    var Next = Shares[Count].Index;

                    Numerator = (Numerator * -Next) % Modulus;
                    Denominator = (Denominator * (Start - Next)) % Modulus;
                    }

                var InvDenominator = ModInverse(Denominator, Modulus);

                //Console.WriteLine("   Numerator = {0}", Numerator);
                //Console.WriteLine("   Denominator = {0}", Denominator);
                //Console.WriteLine("   InvDenominator = {0}", InvDenominator);

                Accum = (Modulus + Modulus + Accum + (Value * Numerator * InvDenominator)) % Modulus;
                if (Accum < 0) {
                    //Console.WriteLine("Accum = {0}\n", Accum);
                    }
                }

            //Console.WriteLine("Accum = {0} ", Accum);
            return GetBytes (Accum);
            }