class And object_Three

//利用构造函数初始化对象

来源：Visual C# 2008 How to Program,Third Edition

GradeBookTest.cs

using System;

public class GradeBookTest
{
    //Main method begins program execution

    public static void Main(string[] args)
    {
        GradeBook myGradeBook1 = new GradeBook("Your are the best!Nobody can beat you.");

        GradeBook myGradeBook2 = new GradeBook("I'm so lonely,my heart is so empty!");

        Console.WriteLine("Initial course name is:'{0}'\n",myGradeBook1.CourseName);
        Console.WriteLine("Initial course name is:'{0}'\n",myGradeBook2.CourseName);

        myGradeBook1.DisplayMessage();
        myGradeBook2.DisplayMessage();

        Console.ReadKey(true);
    }
}

GradeBook.cs

using System;

public class GradeBook
{
    /*auto-implemented property CourseName implicitly created an
     instance variable for this GradeBook's course name*/
    public string CourseName {get;set;}

    //constructor initializes auto-implemented property

    //CourseName with string supplied as argument

    public GradeBook(string name)
    {
        CourseName = name;
    }

    //display a welcome message to the GradeBook user

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

Our life is fritter away with detial……Simplify,simplify!