using System;

public class Program

{

    public static void Main()

    {

        var woodenDoorFactory = new WoodenDoorFactory();

​

var woodenDoor = woodenDoorFactory.MakeDoor();

var woodenDoorFittingExpert = woodenDoorFactory.MakeFittingExpert();

​

woodenDoor.GetDescription(); //Output : I am a wooden door

woodenDoorFittingExpert.GetDescription();//Output : I can only fit woooden doors

​

var ironDoorFactory = new IronDoorFactory();

​

var ironDoor = ironDoorFactory.MakeDoor();

var ironDoorFittingExpert = ironDoorFactory.MakeFittingExpert();

​

ironDoor.GetDescription();//Output : I am a iron door

ironDoorFittingExpert.GetDescription();//Output : I can only fit iron doors

    }

    interface IDoor {

​

  void GetDescription();

​

}

class WoodenDoor : IDoor

{

  public void GetDescription()

  {

    Console.WriteLine("I am a wooden door");

  }

}

​

class IronDoor : IDoor

{

  public void GetDescription()

  {

    Console.WriteLine("I am a iron door");

  }

}

    interface IDoorFittingExpert

{

  void GetDescription();

}

​

class Welder : IDoorFittingExpert

{

  public void GetDescription()

  {

    Console.WriteLine("I can only fit iron doors");

  }

}

​

class Carpenter : IDoorFittingExpert

{

  public void GetDescription()

  {

    Console.WriteLine("I can only fit wooden doors");

  }

}

    interface IDoorFactory {

  IDoor MakeDoor();

  IDoorFittingExpert MakeFittingExpert();

}

​

// Wooden factory to return carpenter and wooden door

class WoodenDoorFactory : IDoorFactory

{

  public IDoor MakeDoor()

  {

    return new WoodenDoor();

  }

​

  public IDoorFittingExpert MakeFittingExpert()

  {

    return new Carpenter();

  }

}

​

// Iron door factory to get iron door and the relevant fitting expert

class IronDoorFactory : IDoorFactory

{

  public IDoor MakeDoor()

  {

    return new IronDoor();

  }

​

  public IDoorFittingExpert MakeFittingExpert()

  {

    return new Welder();

  }

}

}