0

Code:

class Baseclass
{
    public void Fun()
    {
        Console.Write("Base class" + " "); 

    }
}

class Derived1 : Baseclass
{
    new void Fun()
    {
        Console.Write("Derived1 class" + " "); 

    } 

}
class Derived2 : Derived1 
{
    new void Fun()
    {
        Console.Write("Derived2 class" + " ");

    }
}

As per the definition of the 'new' modifier : "new keyword explicitly hides a member that is inherited from a base class. ". Then when we call the method with new modifier in the derived class it should always give the output as "Derived2 class", But I am always getting the output "Base Class" in all the three conditions.

        Baseclass d1 = new Derived1();
        Baseclass d2 = new Derived2();
        Baseclass b = new Baseclass();
        d1.Fun();
        d2.Fun();
        b.Fun();

Can anyone please clear my doubt?

Prateik
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2 Answers2

1

It does create the correct Object but to access its specific properties, you'd need to cast it first.

Daniel van Heerden
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  • Can you please explain it briefly? – Prateik Mar 17 '16 at 05:59
  • It's just polymorphism, You can assign a more specific class to its base but then you'll only be able to access the base's properties. But the Object can than be cast to its real form. Example `var castd1 = (Derived1)d1` – Daniel van Heerden Mar 17 '16 at 06:21
  • I concede my answer is partially incomplete. @paolo_montgomery_russo answer will be the reason why you are seeing the same output being written each time. – Daniel van Heerden Mar 17 '16 at 07:40
1

To get the expected behaviour you must mark method as virtual in base class and override it in subs. You declared all variables as baseclass type so baseclass method should apply.

Paolo The Caveman Russo
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