facade外观模式

 internal class Wheel
    {
        public void WAction1()
        {
        }
        public void WAction2()
        {
        }
    }

 internal class Engine
    {
        public void EAction1()
        {
        }
        public void EAction2()
        {
        }
    }

 internal class Controller
    {
        public void CAction1()
        {
        }
        public void CAction2()
        {
        }
    }

internal class BodyWork
    {
        public void BAction1()
        {
        }
        public void BAction2()
        {
        }
    }

 public class TankFacade
    {
        Wheel[] wheels = new Wheel[ 4 ];
        Engine[] engins = new Engine[ 4 ];
        BodyWork body = new BodyWork();
        Controller control = new Controller();

        public void Start()
        {
            control.CAction1();
            engins[ 0 ].EAction1();
            engins[ 1 ].EAction1();
            wheels[ 0 ].WAction1();
            wheels[ 1 ].WAction2();
        }
        public void Stop()
        {
        }
        public void Run()
        {
        }
        public void Shot()
        {
        }
    }

例如提供API