using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

​

namespace ConsoleApplication9

{

​

​

    public class A: C , P

    {

        public int aid;

        public string aname;

        public void adata()

        {

            Console.WriteLine("enter the name of c");

            cname = Console.ReadLine();

            Console.WriteLine("enter the id of c");

            cid = int.Parse(Console.ReadLine());

        }

​

        public override void cdata()

        {

            Console.WriteLine("enter the name of A");

            aname = Console.ReadLine();

            Console.WriteLine("enter the id of A");

            aid = int.Parse(Console.ReadLine());

        }

​

        public override void bdata()

        {

            Console.WriteLine("enter the name of C");

            bname = Console.ReadLine();

            Console.WriteLine("enter the id of C");

            bid = int.Parse(Console.ReadLine());

        }

            public void print()

        {

            Console.WriteLine("Enter the C name " + cname + "Enter the ID of C : " + cid + "\nEnter the B name:  " + bname + " Enter the ID of B : " + bid + "\nEnter the A name : " + aname + "Enter the ID of A : " + aid);

        }

​

    }

​

    public abstract class B 

    {

        public int bid;

        public string bname;

        public abstract void bdata();

    }

  public abstract class C : B

    {

        public int cid;

        public string cname;

        public abstract void cdata();

    }

    interface P

    {

        void print();

    }

​

    public class main

    {

        public static void Main(string[] args)

        {

            A a1 = new A();

            a1.cdata();

            a1.adata();

            a1.bdata();

            a1.print();

        }

    }

​

}

​