How can I set default value to an attribut in the parent constructor?

I have two constructor :

public abstract class A
{
    public A(int a,int b = 0 ) {}
} 

public class B : A
{
    public B(int a , int b):base(a,b) {} // I would like to didn't call again the attribute b 
       // because it's set to 0 in the parent class 
      //   public B(int a):base(a) {} 
}

Maybe my question was ridiculous but I’m searching for a trick to avoid the repeat of calling an attribute with default set to 0 in the parent class, In fact, I have many child classes

Is it possible to do that?

Update :

This is an instance of B created in MainWindow :

B b1 = new B(1); // a = 1 and b = 0 by default 
B b2 = new B(2,1) // I would like to update the value b and set it to 1 for in the second instance created , In this case I got an error 
// B does not contains a constructor that takes 2 arguments ...

>Solution :

The only way to do this would be to overload the constructor in B:

public class B : A
{
    public B(int a) : base(a) { }
    public B(int a, int b) : base(a, b) { }
}