using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("enter size of class");

        int size = int.Parse(Console.ReadLine());

        Buildgrades(size);

    }

​

    public static int[] Buildgrades(int size)

    {

        int[] grades = new int[10];

        for (int i = 0; i < grades.Length; i++)

        {

            Console.WriteLine("enter grade");

            grades[i] = int.Parse(Console.ReadLine());

        }

​

        return grades;

    }

}