constuctor

It was just an observation, Akash, in case veera tries to use the constructor directly.

There's nothing wrong with your example which is a good one :)

Notice though that you're not allowed to call an abstract class's constructor directly.

If you change A's constructor from protected to public in Akash's example and try to instantiate A using this line:

A a = new A("Hello"); 

then you'll get the following compiler error:

yes , we can do it..

That way you can have classes that inherit from that class call the base constructor.

public abstract class A{

    private string data;

    protected A(string myString){

      data = myString;

    }

}

public class B : A {

     B(string myString) : base(mystring){}

}

accept this answer if it solves your issue..

Akash