class And object_One

GradeBook.cs

using System;

public class GradeBook
{
    private string courseName;//course name for this GradeBook


    //property to get and set the course name

    public string CourseName
    {
        get
        {
            return courseName;
        }
        set
        {
            courseName = value;
        }
    }

    //display a welcome message to the GradeBook user

    public void DisplayMessage()
    {
        /*use property CourseName to get the name of the course that this GradeBook represents*/
        Console.WriteLine("Welcome to the grade book for \n{0}!",CourseName);
    }
}

GradeBooksTest.cs

using System;

public class GradeBookTest
{
    //Main method begins program execution

    public static void Main(string[] arg)
    {
        //create a GradeBook object and assign it to myGradeBook

        GradeBook myGradeBook = new GradeBook();

        //display initial value of CourseName

        Console.WriteLine("Initial course name is:'{0}'\n",myGradeBook.CourseName);

        //prompt for and read course name

        Console.WriteLine("Please enter the course name:");
        myGradeBook.CourseName = Console.ReadLine();

        //display welcome message after specifying course name

        myGradeBook.DisplayMessage();

        Console.ReadKey(true);
    }
}