C# 2.0学习之--代理２

//Copyright (C) Microsoft Corporation. All rights reserved.

// compose.cs

using System;

delegate void MyDelegate(string s);

class MyClass

{

public static void Hello(string s)

{

Console.WriteLine(" Hello, {0}!", s);

}

public static void Goodbye(string s)

{

Console.WriteLine(" Goodbye, {0}!", s);

}

public static void Main()

{

MyDelegate a, b, c, d;

// Create the delegate object a that references

// the method Hello:

a = new MyDelegate(Hello);

// Create the delegate object b that references

// the method Goodbye:

b = new MyDelegate(Goodbye);

// The two delegates, a and b, are composed to form c,

// which calls both methods in order:

c = a + b;

// Remove a from the composed delegate, leaving d,

// which calls only the method Goodbye:

d = c - a;

Console.WriteLine("Invoking delegate a:");

a("A");

Console.WriteLine("Invoking delegate b:");

b("B");

Console.WriteLine("Invoking delegate c:");

c("C");

Console.WriteLine("Invoking delegate d:");

d("D");

}

}

csc compose.cs
compose