using System;

​

namespace CarDelegate;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        Car c1 = new Car("Slugbug", 100, 10);

        c1.RegisterWithCarEngine(new Car.CarEngineHandler(

        OnCarEngineEvent));

        Console.WriteLine("Speeding up");

        for (int i = 0; i < 6; i++)

        {

            c1.Accelerate(20);

        }

        Console.ReadLine();

        static void OnCarEngineEvent(string msg)

​

        {

            Console.WriteLine("\n Message From Car Object");

            Console.WriteLine("=> {0}", msg);

        }

    }

}

​

public class Car

{

    public delegate void CarEngineHandler(string msgForCaller);

    private CarEngineHandler _listOfHandlers;

    public void RegisterWithCarEngine(CarEngineHandler methodToCall)

    {

        _listOfHandlers = methodToCall;

    }

    public int CurrentSpeed {get; set;}

    public int MaxSpeed {get; set;} = 100;

    public string PetName {get; set;}

    private bool _carIsDead;

    public Car() {}

    public Car(string name, int maxSp, int currSp) 

    {

        CurrentSpeed = currSp;

        MaxSpeed = maxSp;

        PetName = name;

    }

    public void Accelerate(int delta) 

    {

        if (_carIsDead){

            _listOfHandlers?.Invoke("Sorry, this car is dead");

        }

        else

        {

            CurrentSpeed += delta;

        }

        if (10 == (MaxSpeed - CurrentSpeed))

        {

            _listOfHandlers?.Invoke("Careful buddy! Gonnablow");

        }

        if (CurrentSpeed >= MaxSpeed) 

        {

            _carIsDead = true;

        }

        else 

        {

            Console.WriteLine("CurrentSpeed = {0}", CurrentSpeed);

        }

    }

}