using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Four
{

    class Program
    {
        static void Main(string[] args)
        {
            string answ = "";
            int answer=0,i=0;
            List<One.Base> classi = new List<One.Base>();
            while ( answ!="нет")
            {
                Console.WriteLine("Объект какого из классов добавить?(1/2) ");
                answer =int.Parse( Console.ReadLine());
                switch (answer)
                {
                    case 1:
                        {
                            Console.WriteLine("Введите a и b");
                            int a = int.Parse(Console.ReadLine());
                            int b = int.Parse(Console.ReadLine());
                            classi.Add(new Two.ElseOne(i, a, b));
                            
                            i++;
 
                            break;
                        }
                    case 2:
                        {
                            Console.WriteLine("Введите a и b");
                            int a = int.Parse(Console.ReadLine());
                            int b = int.Parse(Console.ReadLine());
                            classi.Add(new Three.ElseOne(i, a, b));
                            i++;
                           
                            break;
                        }
                }
                Console.WriteLine("Добавить еще?");
                answ = Console.ReadLine();
                for (int k=1; k > classi.Count; k++)
                {
                    classi[k].ArithmeticMethod();
                    classi[k].ClassInfoMethod();
                    
                }
                
            }
            Console.ReadKey();
        }
    }
}

namespace One
{
    public abstract class Base
    {
        public int i, a, b;
        public Base(int i, int a, int b)
        {
            this.i = i;
            this.a = a;
            this.b = b;
        }
        public virtual int ArithmeticMethod()
        {
            return a * b;
        }
        public void SetObjectNum()
        {
            this.i = i*1;
        }
        public abstract void ClassInfoMethod();

    }
}
namespace Two
{
    public class ElseOne : One.Base
    {

        public ElseOne(int i,int a,int b): base(i, a, b)
        {
            this.a = a;
            this.b = b;
            this.i = i;
        }
        public override int ArithmeticMethod()
        {
            return a + b;
        }
        public void SetObjectNum(int number)
        {
            this.i = i;
        }
        public override void ClassInfoMethod()
        {
            Console.WriteLine("ElseOne другой " + i);
        }

    }

}
namespace Three
{
    public class ElseOne : One.Base
    {
        public ElseOne(int i, int a, int b): base(i, a, b)
        {
            this.a = a;
            this.b = b;
            this.i = i;
        }
        public override int ArithmeticMethod()
        {
            return a / b;
        }
        public void SetObjectNum(int number)
        {
            this.i = number;
        }
        public override void ClassInfoMethod()
        {
            Console.WriteLine("AndElse " + i);
        }

    }
}