Russian Peasant Algoritm C#

        public static int RussianPeasantAlgorithm(int a, int b){
            int z = 0;
            while (a > 0){
                    if (a % 2 == 1){ z = z + b;}
                b = b << 1;
                a = a >> 1;
            }
            return z;
        }

        public static int NormalMultiplication(int a, int b){
            int z = 0;
            while (a > 0){
                z = z + b;
                a = a - 1;
            }
            return z;
        }