// Fig. 4.12: GradeBook.cs

// GradeBook class with a constructor to initialize the course name.

using System;

​

namespace GradeBook

{

    public class GradeBook

    {

        public string CourseName { get; set; }

        public string InstructorName { get; set; }

       // constructor initializes auto-implemented property 

       // CourseName with string supplied as argument 

        public GradeBook( string name, string instructorName)

        {

​

            CourseName = name; // set CourseName to name

            InstructorName = instructorName; // set InstructorName to instructorName

        }   //end constructor

​

​

        //display a welcome message to the GradeBook user

        public void DisplayMessage()

        {

            Console.WriteLine("Welcome to the Grade Book for {0}! This course is presented by: {1}.", CourseName, InstructorName);

        }//end method DisplayMessage

        //end class Gradebook

    }

     public class GradeBookTest

    {

        //main method begins program execution

        public static void Main(string[] args)

        {

            // create GradeBook object

            GradeBook gradeBook1 = new GradeBook(// invokes constructor 

                "CS101 Introduction to C# Programming", "Sam Smith" );

        // display message 

        gradeBook1.DisplayMessage();

        // display message

        Console.WriteLine( "\nChanging instructor name to Judy Jones\n" );

        // set gradeBook1.instructor  to Judy Jones     

        gradeBook1.InstructorName = "Judy Jones";

            //end Main

          // end class GradebookTest

​

​

        }

​

​

    }

}