why we override the parent method in Child Class???

simple example is area method of shapes

 

while in child classes we extend the functionality according to the child class implementation

eg:

 

for square we will use

 

public override area()

{

return side *side; 

 

} 

 

while in rectangle we will use

 

public override area

{

return length * width;

} 

 

I hope you understand. 

Bro.........

It is necessary override the parent method.Why we can't create another method in child class for execution.what is need for overriding parent method.

 

 

and one more thing.

abstract class has a constructor then why we can't create instance. 

only can override parent methods into child so that.

If you not give override keyword can not override.

We override a method if we want to have extra behavior.Refer below link for more info:

 

http://www.codeproject.com/Articles/18734/Method-Overriding-in-C