using System;

public class GradeBookTest

{

    public static void Main()

    {

        GradeBook myGradeBook = new GradeBook("Introduction to C# Programming");

        myGradeBook.DisplayMessage();

        myGradeBook.DetermineClassAverage();

    }

}

​

public class GradeBook

{

    public string CourseName

    {

        get; set;

    }

    public GradeBook (string name)

    {

        CourseName = name;

    }

​

    public void DisplayMessage()

    {

        Console.WriteLine("Welcome to the GradeBook for \n{0}\n", CourseName);

    }

    public void DetermineClassAverage()

    {

        int total, gradeCounter, grade;

        double average;

        total = 0; 

        gradeCounter = 1;

        while (gradeCounter <= 10)

        {

            Console.WriteLine("Enter grade : ");

            grade = Convert.ToInt32(Console.ReadLine());

            total = total + grade;

            gradeCounter = gradeCounter + 1;

        }

        if (gradeCounter != 0)

        {

            average = total / 10;

            Console.WriteLine("The total of all 10 grades entered is {0}", total);

            Console.WriteLine("Class average is {0}", average);

        }

    }

​

​

}