public static void Main(string[] args)
{
// create GradeBook object myGradeBook and
// pass course name to constructor
GradeBook myGradeBook = new GradeBook(
"CS101 Introduction to C# Programming");
myGradeBook.DisplayMessage(); // display welcome message
myGradeBook.InputGrades(); // read grades from user
myGradeBook.DisplayGradeReport(); // display report based on grades
} // end Main