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

namespace ConsoleApplication1
{
     // Phone classes
     abstract class Phone
     {
          public abstract Graphic Create();
     }

     class SamsungPhone : Phone
     {
          public override Graphic Create() // factory method
          {
               return new SamsungGraphic();
          }
     }

     class ApplePhone : Phone
     {
          public override Graphic Create() // factory method
          {
               return new AppleGraphic();
          }
     }

     // Graphic classes
     abstract class Graphic
     {
     }

     class AppleGraphic : Graphic
     {
     }

     class SamsungGraphic : Graphic
     {
     }

     // Program class
     class Program
     {
          static void Main(string[] args)
          {
               // samsung phone
               Phone phone = new SamsungPhone();
               Graphic graphic = phone.Create(); // factory method

               // apple phone
               phone = new ApplePhone();
               graphic = phone.Create(); // factory method
          }
     }
}