// GradeBook.cs

// Class declaration with a method that has a parameter.

using System;

public class GradeBook {

// display a welcome message to the GradeBook user

 public void DisplayMessage(string courseName) {

     Console.WriteLine("Welcome to the grade book for\n{0}!", courseName);

   } // end method DisplayMessage

 } // end class GradeBook

​

public class GradeBookTest {

​

// Main method begins program execution 

public static void Main( string[] args ) { 

// create a GradeBook object and assign it to myGradeBook

    GradeBook myGradeBook = new GradeBook();

// prompt for and input course name

   Console.WriteLine( "Please enter the course name:" ); 

  string nameOfCourse = Console.ReadLine(); // read a line of text

​

   Console.WriteLine(); // output a blank line

// call myGradeBook'sDisplayMessage method 

// and pass nameOfCourse as an argument

  myGradeBook.DisplayMessage(nameOfCourse); 

 } // end Main

 } // end class GradeBookTest

​