装饰模式

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Decorate
{
    class Program
    {
        static void Main(string[] args)
        {
            Mobilephone apple = new Apple();
            char i; bool s = true;
            Console.WriteLine("--------------------------------------");
            Console.WriteLine(" ALL function:");
            Console.WriteLine(" Bluetooth----1.");
            Console.WriteLine(" GPS----2.");
            Console.WriteLine(" Camera----3.");
            Console.WriteLine(" End----0.");
            Console.WriteLine("Please input the choice:");
            while (s)
            {
               
                i = (char)Console.Read();
                if (i == '0') { s=false; }
                if (i == '1')
                {
                    Bluetooth bluetooth = new Bluetooth();
                    bluetooth.Decorate(apple);
                    bluetooth.SendMessage();
                    bluetooth.Call();
                }
                if (i == '2')
                {
                    GPS gps = new GPS();
                    gps.Decorate(apple);
                    gps.SendMessage();
                    gps.Call();
                }
                if (i == '3')
                {
                    Camera camera = new Camera();
                    camera.Decorate(apple);
                    camera.SendMessage();
                    camera.Call();
                }
            }
        }
    }
}

        abstract class Mobilephone
        {
            public Mobilephone() { }
            public abstract void SendMessage();
            public abstract void Call();
        }
        class Apple:Mobilephone
        {
            public Apple():base()
            { }
            public override void SendMessage()
            {
                Console.WriteLine("Apple Sending Message");
            }

            public override void Call()
            {
                Console.WriteLine("Apple Calling");
            }
        }

        class Mi : Mobilephone
        {
            public Mi()
                : base()
            { }
            public override void SendMessage()
            {
                Console.WriteLine("Mi Sending Message");
            }

            public override void Call()
            {
                Console.WriteLine("Mi Calling");
            }
        }

        abstract class Function:Mobilephone
        {
            private Mobilephone _mobilephone;
            public Function() : base() { }
            public void Decorate(Mobilephone mobilephone)
            {
                _mobilephone = mobilephone;
            }
            public override void SendMessage()
            {
                _mobilephone.SendMessage();
            }

            public override void Call()
            {
                _mobilephone.Call();
            }
        }
        class Bluetooth:Function
        {
            public Bluetooth() : base() { }
            public override void SendMessage()
            {
                base.SendMessage();
                AddBluetooth();
                Connect();
            }
            public override void Call()
            {
                base.Call();
                AddBluetooth();
                Connect();
            }
            public void AddBluetooth()
            {
                Console.WriteLine("Bluetooth");
            }

            public void Connect()
            {
                Console.WriteLine("Connecting");
            }
        }
        class GPS : Function
        {
            public GPS() : base() { }
            public override void SendMessage()
            {
                base.SendMessage();
                AddGPS();
                location();
            }
            public override void Call()
            {
                base.Call();
                AddGPS();
                location();
            }
            public void AddGPS()
            {
                Console.WriteLine("GPS");
            }

            public void location()
            {
                Console.WriteLine("Locating");
            }
        }
        class Camera : Function
        {
            public Camera() : base() { }
            public override void SendMessage()
            {
                base.SendMessage();
                AddCamera();
                Came();
            }
            public override void Call()
            {
                base.Call();
                AddCamera();
                Came();
            }
            public void AddCamera()
            {
                Console.WriteLine("Camera");
            }

            public void Came()
            {
                Console.WriteLine("Camera is on");
            }
        }