Item 33: Use the new Modifier Only to React to Base Class Updates(Effective C#)

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 
 6 namespace EffectiveCSharpItem33
 7 {
 8     class Base 
 9     {
10         public void MagicMethod() 
11         {
12             Console.WriteLine("magic method from base.");
13         }
14     }
15 
16     class Derived : Base 
17     {
18         public new void MagicMethod() 
19         {
20             Console.WriteLine("magic method from derived.");
21         }
22     }
23 
24     class Program
25     {
26         static void Main(string[] args)
27         {
28             Derived d = new Derived();
29             d.MagicMethod();
30 
31             Base b = d as Derived;
32             b.MagicMethod();
33         }
34     }
35 }