public class Program
    {
        private static int[] scores;

        public static void Main(string[] args)
        {
            scores = new int[0];

            int selection = 0;
            do
            {
                selection = UserMenu();

                if (selection == 1)
                {
                    SelectionOne();
                }
                else if (selection == 2)
                {
                    SelectionTwo();
                }
                else if (selection == 3)
                {
                    SelectionThree();
                }
            }
            while (selection != 4);
        }

        public static int UserMenu()
        {
            Console.WriteLine("________Menu________");
            Console.WriteLine("1) enter scores");
            Console.WriteLine("2) list scores");
            Console.WriteLine("3) calculate statistics");
            Console.WriteLine("4) exit");
            Console.WriteLine("_____________________");
            Console.WriteLine("Make a selection (1-4)");

            return Convert.ToInt32(Console.ReadLine());
        }

        public static void SelectionOne()
        {
            Console.WriteLine("How many scores do you want to enter?");
            int scoreCount = Convert.ToInt32(Console.ReadLine());
            scores = new int[scoreCount];
            for (int i = 0; i < scores.Length; i++)
            {
                Console.WriteLine("Enter a score:");
                scores[i] = Convert.ToInt32(Console.ReadLine());
            }
        }

        public static void SelectionTwo()
        {
            Console.WriteLine("___Scores___");
            foreach (int score in scores)
            {
                Console.WriteLine(score);
            }
            Console.WriteLine("_____________");
        }

        public static void SelectionThree()
        {
            int low = 100;
            int high = 0;
            int sum = 0;
            foreach (int score in scores)
            {
                sum = sum + score;
                if (score > high)
                {
                    high = score;
                }
                if (score < low)
                {
                    low = score;
                }

            }
            Console.WriteLine("___Statistics___");
            Console.WriteLine("Low: " + low);
            Console.WriteLine("High: " + high);
            Console.WriteLine("Average: " + (sum / scores.Length));
            Console.WriteLine("_________________");
        }
    }