new versus override - CSharp Custom Type

CSharp examples for Custom Type:virtual

  1. HOME
  2. CSharp
  3. Custom Type
  4. virtual

Introduction

Consider the following class hierarchy:

Demo Code

using System;//from  w  ww  .  j a v a  2  s.  c o  m
public class BaseClass
{
   public virtual void Foo()  { Console.WriteLine ("BaseClass.Foo"); }
}
public class Overrider : BaseClass
{
   public override void Foo() { Console.WriteLine ("Overrider.Foo"); }
}
public class Hider : BaseClass
{
   public new void Foo()      { Console.WriteLine ("Hider.Foo"); }
}
class Test
{
   static void Main(){
      Overrider over = new Overrider();
      BaseClass b1 = over;
      over.Foo();                         // Overrider.Foo
      b1.Foo();                           // Overrider.Foo
      Hider h = new Hider();
      BaseClass b2 = h;
      h.Foo();                           // Hider.Foo
      b2.Foo();                          // BaseClass.Foo
}
}

Result


Related Tutorials