using System;

​

class Program

{

    static void Main()

    {

        AbstractCar car = AbstractCar.GetInstance();

        car.ShowSpeed();

​

        Console.WriteLine($"It is a real {car.GetType().Name}");

    }

​

    abstract class AbstractCar

    {

        public static AbstractCar GetInstance()

        {

            return new RaceCar();

        }

​

        public void ShowSpeed()

        {

            Console.WriteLine("Speed is 50 km/hour");

        }

    }

​

    class RaceCar : AbstractCar

    {

        public void ShowSpeed()

        {

            Console.WriteLine($"Speed is 200 km/hour");

        }

    }

}