using System;

public class Program

{

​

        static void increment(ref int value)

        { value++; }

        int number = 1;

        increment(ref number);

        Console.WriteLine(number);

        public class Engine

        { public int Volume;

         public int Power;

         public Engine(int engineVolume, int enginePower)

         { engineVolume *= 1000;

          Volume = engineVolume;

          Power = enginePower; }

          public class Car

          { public string brand;

           public string model;

           public Engine egine;

           public Car(string carBrand, string carModel, Engine carEngine)

           { brand = carBrand;

             model = carModel;

            engine = carEngine;

            engine.Power = 110;

           }

           public void changeRef(ref Engine changeEngine)

           { Engine newEngine = new Engine(5, 600);

            changeEngine = newEngine;

           }

          } 

         public class Program

         { Engine myEngine = new Engine(2, 180);

          Car myNextCar = new Car ("FlyCar", "Mark1", myEngine);

          myNextCar.changeRef(ref myEngine);

          Console.WriteLine(myEngine.Power);

  }

}

}