From Java to C#: A Developer's Guide

14.2. A first delegate example

Let's combine what we have done so far into a full concrete example. Study the program below.

 1:  using System;
 2:
 3:  delegate int MyDelegate (int i);
 4:
 5:  class TestClass{
 6:
 7:    static int Double (int val){
 8:      Console.WriteLine("running Double");
 9:      return val*2;
10:    }
11:
12:    int Triple (int val){
13:      Console.WriteLine("running Triple");
14:      return val*3;
15:    }
16:
17:    public static void Main(){
18:
19:      TestClass tc = new TestClass();
20:      MyDelegate d1, d2;
21:
22:      d1 = new MyDelegate(TestClass.Double);
23:      d2 = new MyDelegate(tc.Triple);
24:
25:      Console.WriteLine(d1(3));
26:      Console.WriteLine(" ---------- ");
27:      Console.WriteLine(d2(5));
28:    }
29:  }

Output:

 c:\expt>test Running Double 6 ---------- Running ...