using System;

using System.Collections.Generic;

public class A

{

    private int x;

    protected int y;

    public int z;

}

public class B:A{

    public int d;

    protected int e;

    private int f;

    public int x;

    public int y;

    public int z; 

    public void Foo(){

        x = 2;

        y = 2;

        z = 2;

        d = 2;

        e = 2;

        f = 2;

    }

}

public class Program

{

    public static void Main()

    {

        A A = new A();

        A.z = 1;

        B B = new B();

        B.d = 1;

        B.z = 1;

    }

}

​