using System;

using System.Collections.Generic;

​

namespace FactoryMethod.RealWorld

{

    // MainApp startup class for Real-World Factory Method

    class MainApp

    {

        // Entry point into console application

        static void Main()

        {

            // Note: constructors call Factory Method

            Document[] documents = new Document[2];

            documents[0] = new Resume();

            documents[1] = new Report();

            // Display document pages

            foreach (Document document in documents)

            {

                Console.WriteLine("\n" + document.GetType().Name + "-------");

                foreach (Page page in document.Pages)

                {

                    Console.WriteLine(" " + page.GetType().Name);   

                }

            }

        }

    }

    // The 'Page' (Product) abstract class

    abstract class Page

    {

    }

    // A 'SkillsPage' (ConcreteProduct) class

    class SkillsPage : Page

    {

    }

    // An 'EducationPage (ConcreteProduct) class

    class EducationPage : Page

    {

    }

    // An 'ExperiencePage' (ConcreteProduct) class

    class ExperiencePage : Page

    {

    }

    // An 'IntroductionPage' (ConcreteProduct) class

    class IntroductionPage : Page

    {

    }

    // A 'ResultsPage' (ConcreteProduct) class

    class ResultsPage : Page

    {

    }

    // A 'ConclusionPage' (ConcreteProduct) class

    class ConclusionPage : Page

    {

    }

    // A 'SummaryPage' (ConcreteProduct) class

    class SummaryPage : Page

    {

    }

    // A 'BibliographyPage' (ConcreteProduct) class

    class BibliographyPage : Page

    {

    }

    // The 'Document' (Creator) abstract class

    abstract class Document

    {

        private List<Page> _pages = new List<Page>();

        // Constructor calls abstract Factory Method

        public Document()

        {

            this.CreatePages(); 

        }

        public List<Page> Pages

        {

            get { return _pages; }  

        }

        // Factory Method

        public abstract void CreatePages();

    }

    // A 'Resume' (ConcreteCreator) class

    class Resume : Document

    {

        // Factory Method implementation

        public override void CreatePages()

        {

            Pages.Add(new SkillsPage());

            Pages.Add(new EducationPage());

            Pages.Add(new ExperiencePage());

        }

    }

    // A 'Report' (ConcreteCreator) class

    class Report : Document

    {

        // Factory Method implementation

        public override void CreatePages()

        {

            Pages.Add(new IntroductionPage());

            Pages.Add(new ResultsPage());

            Pages.Add(new ConclusionPage());

            Pages.Add(new SummaryPage());

            Pages.Add(new BibliographyPage());

        }

    }

}

​

/* CONSOLE OUTPUT

*

*   Resume -------

*    SkillsPage

*    EducationPage

*    ExperiencePage

*

*   Report -------

*    IntroductionPage

*    ResultsPage

*    ConclusionPage

*    SummaryPage

*    BibliographyPage

*/