CodeAnalysis-CodeQuality.md

Given the following:

 class Animal
 {
    public virtual string speak(int x) { return "silence"; }
 }

 class Cat : Animal
 {
      public string speak(int x) { return "meow"; }
 }

 class Dog : Animal
 {
      public string speak(short x) { return "bow-wow"; }
 }

Question: Explain why the block below does not emit “bow-wow”: Animal d = new Dog(); Console.Write(d.speak(0));

This is an example of method hiding. Method hides the base class method if using a derived class. However, if you are treating it as a base type like this it will use the base class implementation. If you want d.speak(0) to say bow-wow you would override the method instead.

 class Dog : Animal
 {
      public string speak(short x) { return "bow-wow"; }
 }