外观模式

using System;
using System.Collections.Generic;

internal class Engine
{
    public string EngineWork()
    {
        return "BMW's Engine is Working";
    }
    public string EngineStop()
    {
        return "BMW's Engine is stop";
    }
}

internal class Wheel
{
    public string WheelStart()
    {
        return "BMW's Wheel is start";
    }
    public string WheelStop()
    {
        return "BMW's Wheel is stop";
    }
}

internal class Body
{
    public Wheel[] wheels=new Wheel[4];
    public Engine engine=new Engine();
    
    public Body()
    {
        for(int i=0;i<wheels.Length;i++)
        {
            wheels[i]=new Wheel();
        }
    }
}

public class carFacade
{
    Body myBody=new Body();
    public void Run()
    {
        Console.WriteLine(myBody.engine.EngineWork());
        for(int i=0;i<myBody.wheels.Length;i++)
        {
            Console.WriteLine(myBody.wheels[i].WheelStart());
        }
    }
    
    public void Stop()
    {
        Console.WriteLine(myBody.engine.EngineStop());
        for(int i=0;i<myBody.wheels.Length;i++)
        {
            Console.WriteLine(myBody.wheels[i].WheelStop());
        }
    }
}

public class MyClass
{
    public static void Main()
    {
        carFacade mycarFacade=new carFacade();
        mycarFacade.Run();
        mycarFacade.Stop();
        Console.ReadLine();
    }
}