C# 装饰模式

// See https://aka.ms/new-console-template for more information
/*
 * 个人理解
 你要往原有的东西上加东西
 Phone=装饰手机原材料
 Decorator=装饰手机中间人
 XiaoMi=具体装饰的手机
 Sticker=装饰手机中间人拿装饰手机原材料来装饰XiaoMi。给它贴膜
 */

//拿出小米手机
Phone phone1 = new XiaoMi();
Decorator xiaoMiSticker = new Sticker(phone1);
xiaoMiSticker.Print();
Decorator xiaoMiAccessories = new Accessories(phone1);
xiaoMiAccessories.Print();
/// <summary>
/// 手机抽象类，即装饰者模式中的抽象组件类
/// </summary>
public abstract class Phone
{
    public abstract void Print();
}
/// <summary>
/// 装饰类
/// </summary>
public abstract class Decorator : Phone
{
    private Phone Phone;
    protected Decorator(Phone phone)
    {
        Phone = phone;
    }
    public override void Print()
    {
        if (Phone != null)
            Console.WriteLine("我是Decorator重写实现");
        Phone?.Print();
    }
}
/// <summary>
/// 小米手机，即装饰着模式中的具体组件类
/// </summary>
public class XiaoMi : Phone
{
    /// <summary>
    /// 重写基类方法
    /// </summary>
    public override void Print()
    {
        Console.WriteLine("开始执行具体对象-小米手机");
    }
}
/// <summary>
/// 苹果手机，即装饰着模式中的具体组件类
/// </summary>
public class Iphone : Phone
{
    public override void Print()
    {
        Console.WriteLine("开始执行具体对象-苹果手机");
    }
}
public class Redmi : Phone
{
    public override void Print()
    {
        Console.WriteLine("开始执行具体对象-红米手机");
    }
}

/// <summary>
/// 手机贴膜
/// </summary>
public class Sticker : Decorator
{
    public Sticker(Phone phone) : base(phone)
    {
    }
    public override void Print()
    {
        //  base.Print();
        Console.WriteLine("开始贴膜");
        AddSticker();
    }
    /// <summary>
    /// 新的行为方法
    /// </summary>
    public void AddSticker()
    {
        Console.WriteLine("现在小米手机有贴膜了");
    }
}
/// <summary>
/// 手机挂件
/// </summary>
public class Accessories : Decorator
{
    public Accessories(Phone phone) : base(phone)
    {
    }
    public override void Print()
    {
        // base.Print();
        Console.WriteLine("开始挂挂件");
        AddSticker();
    }
    /// <summary>
    /// 新的行为方法
    /// </summary>
    public void AddSticker()
    {
        Console.WriteLine("现在小米手机有挂件了");
    }
}