Bowling.Frame.IsSpare C# (CSharp) Метод

        private bool IsSpare()
        {
            return FirstTry + SecondTry == 10;
        }

        public int Score(Frame frame, Frame nextFrame)
        {
            if (frame?.IsStrike() ?? false)
            {
                return(10 + Score(nextFrame));
            }

            if (frame?.IsSpare() ?? false)
            {
                return(10 + Score(nextFrame?.Tries.ElementAtOrDefault(0)));
            }

            return(Score(frame));
        }