using System;

public class Program

{

    public static void Main()

    {

          IFanFactory simpleFactory = new FanFactory();

        // Creation of a Fan using Simple Factory

        IFan fan = simpleFactory.CreateFan(FanType.TableFan);

        // Use created object

        fan.SwitchOn();

​

        Console.ReadLine();

    }

}

​

​

​

enum FanType

{

    TableFan,

    CeilingFan,

    ExhaustFan

}

​

interface IFan

{

    void SwitchOn();

   void SwitchOff();

}

​

 class TableFan : IFan 

{ 

    public void SwitchOn()

{

}

    public  void SwitchOff()

{

}

}

​

class CeilingFan : IFan 

{ 

public  void SwitchOn()

{

}

    public  void SwitchOff()

{

}}

​

class ExhaustFan : IFan 

{

   public void SwitchOn()

{

}

        public void SwitchOff()

{

}}

​

interface IFanFactory

{

    IFan CreateFan(FanType type);

}

​

class FanFactory : IFanFactory

{

    public IFan CreateFan(FanType type)

    {

        switch (type)

        {

            case FanType.TableFan:

                return new TableFan();

            case FanType.CeilingFan:

                return new CeilingFan();

            case FanType.ExhaustFan:

                return new ExhaustFan();

            default:

                return new TableFan();

        }

    }

}