using System;

public class Program

{

    public static void Main()

    {

        var number = new int[5];

        Console.WriteLine("Please enter 5 numbers:");

​

        for (int i = 0; i < 5; i++)

        {

            while (true)

            {

                var newValue = Convert.ToInt32(Console.ReadLine());

                var currentNumber = Array.IndexOf(number, newValue);

                if (currentNumber == -1)

                {

                    number[i] = newValue; // Accept New value

                    break;

                }

                Console.WriteLine("That number is already entered. Try again.");

            }

        }

​

        Array.Sort(number);

        Console.WriteLine("Press enter to get the average.");

​

        foreach (var n in number)

            Console.WriteLine(n);

​

        Console.ReadLine(); 

        double number1,number2,number3,number4,number5;

     Console.Write("Enter the First number: ");

     number1 = Convert.ToDouble(Console.ReadLine());

     Console.Write("Enter the Second number: ");

     number2 = Convert.ToDouble(Console.ReadLine());

     Console.Write("Enter the third number: ");

     number3 = Convert.ToDouble(Console.ReadLine());

     Console.Write("Enter the fourth number: ");

     number4 = Convert.ToDouble(Console.ReadLine());

    Console.Write("Enter the fifth number: ");

     number5 = Convert.ToDouble(Console.ReadLine());

     double result = (number1 + number2 + number3 + number4 + number5) / 5;

     Console.WriteLine("The average of {0}, {1}, {2}, {3}, {4} is: {5} ",

  number1, number2, number3, number4, number5, result);

     }

}