2024年3月23日发(作者：)

using System;

using c;

using entModel;

using ;

using g;

using ;

using ;

using ;

namespace WindowsFormsApplication1

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

class bell

{

public delegate void RingDelegate();

public event RingDelegate RingEvent;

public void Ring()

{

if (RingEvent != null)

{

RingEvent();

}

}

}

class Student

{

public Student(bell bella)

{

ent += new legate(Run);

}

public void Run()

{

("老¤?师º|、¡é学¡ì生¦¨² 进?教¨¬室º¨°准Á?备À?上¦?课?");

}

}

private void button1_Click(object sender, EventArgs e)

{

bell bella = new bell();

Student m = new Student(bella);

();

}

}

}