c \ # 공장 모델 간단 한 예

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

/*                     ，                   ，
                    ，           */


namespace       
{
    //     
    public abstract class Book
    {
        public abstract void GetBook();
    }
    //     
    public class LiteratureBook : Book
    {
        public override void GetBook()
        {
            Console.WriteLine("         ！");
        }
    }
    //       
    public class ComputerBook : Book
    {
        public override void GetBook()
        {
            Console.WriteLine("          ！");
        }
    }
    //      
    public abstract class Manager
    {
        public abstract Book GetBook();
    }
    //         
    public class LiteratureManager: Manager
    {
        public override Book GetBook()
        {
            Book book;
            book = new LiteratureBook();
            return book;
        }
    }
    //          
    public class ComputerManager : Manager
    {
        public override Book GetBook()
        {
            Book book;
            book = new ComputerBook();
            return book;
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            //               
            Manager computermanager = new ComputerManager();
            //              
            Manager literaturemanager = new LiteratureManager();

            //       
            Book literaturebook = literaturemanager.GetBook();
            literaturebook.GetBook();
            //        
            Book computerbook = computermanager.GetBook();
            computerbook.GetBook();

            Console.ReadKey();

        }
    }
}