using System;

​

public interface Accelerate

{

    void InterfaceAccelerate();

}

​

public class Car : Accelerate

{

    public virtual void VirtualAccelerate()

    {

        Console.WriteLine("Accelerating an unknown car");

    }

​

    public virtual void InterfaceAccelerate()

    {

        Console.WriteLine("Accelerating an unknown car");

    }

​

    public virtual void Accelerate()

    {

        Console.WriteLine("Accelerating an unknown car");

    }

}

​

public class ElectricCar : Car, Accelerate

{

    public override void VirtualAccelerate()

    {

        Console.WriteLine("Accelerating an Electric car");

    }

​

    public override void InterfaceAccelerate()

    {

        Console.WriteLine("Accelerating an Electric car");

    }

​

    public override void Accelerate()

    {

        Console.WriteLine("Accelerating an Electric car");

    }

}

​

public class PetrolCar : Car, Accelerate

{

    public override void VirtualAccelerate()

    {

        Console.WriteLine("Accelerating an Petrol car");

    }

​

    public override void InterfaceAccelerate()

    {

        Console.WriteLine("Accelerating an Petrol car");

    }

​

    public override void Accelerate()

    {

        Console.WriteLine("Accelerating an Petrol car");

    }

}

​

public class Program

{

    public static void Main()

    {

        ElectricCar electricCar = new ElectricCar();

        Car electricCarAsCar = new ElectricCar();

        InterfaceAccelerateCar(electricCar);

        Console.WriteLine("-----");

        AccelerateCar(electricCar);

        Console.WriteLine("------------------");

        InterfaceAccelerateCar(electricCarAsCar);

        Console.WriteLine("-----");

        AccelerateCar(electricCarAsCar);

        Console.WriteLine("------------------");

    }

​

    private static void InterfaceAccelerateCar(Accelerate car)

    {

        car.InterfaceAccelerate(); // This one calls the method Accelerate from Car

    // Because ElectricCar does not override the method Accelerate

    }

​

    private static void AccelerateCar(Car car)

    {

        car.VirtualAccelerate();

        car.InterfaceAccelerate();

        car.Accelerate();

    // This one calls the method Accelerate from Car

    // Because ElectricCar does not override the method Accelerate

    }

}