using System;

​

class A

{

    public int x;

    protected int y;

    private int z;

}

​

class B: A

{

    private int d;

    protected int e;

    public void Foo(){

        x = 2;

        y = 2;

        d = 2;

        e = 2;

    }

}

public class Program

{

    public static void Main()

    {

        B objB = new B();

        objB.x = 1;

    }

}

/**

Define public integer fields x, y in class B will cause warning since x and y is already defined in class A and class B can acces them.

Howevere, z is privated in class A so class B cannot access it in itself and therefore, we can set up a public int z in class B.

**/