Стратегия (Strategy)

using System;
using System.Text;
using System.Threading;
using System.Linq;

class Program
{
   static void Main(string[] args)
   {
    Car auto = new Car(4, "Volvo", new PetrolMove());
    auto.Move();
    auto.Movable = new ElectricMove();
    auto.Move();

    Console.ReadLine();
   }
}

interface IMovable
{
    void Move();
}

class PetrolMove: IMovable
{
    public void Move()
    {
        Console.WriteLine("Передвижение на бензине");
    }
}

class ElectricMove: IMovable
{
    public void Move()
    {
        Console.WriteLine("Передвижение на электричестве");
    }
}

class Car
{
    protected int passengers {get;set;}
    protected string model {get;set;}
    public IMovable Movable {private get;set;}

    public Car(int num, string model, IMovable mov)
    {
        this.passengers = num;
        this.model = model;
        this.Movable = mov;
    }

    public void Move()
    {
        Movable.Move();
    }
}