1，定义

原型模式：用原型实例指定创建对象的种类，并且通过拷贝这些原型创建新对象

2，基本代码

 abstract class Prototype
    {
        private string id;

        // Constructor 
        public Prototype(string id)
        {
            this.id = id;
        }

        // Property 
        public string Id
        {
            get { return id; }
        }

        public abstract Prototype Clone();
    }

    class ConcretePrototype1 : Prototype
    {
        // Constructor 
        public ConcretePrototype1(string id)
            : base(id)
        {
        }

        public override Prototype Clone()
        {
            // Shallow copy 
            return (Prototype)this.MemberwiseClone();
        }
    }


    class ConcretePrototype2 : Prototype
    {
        // Constructor 
        public ConcretePrototype2(string id)
            : base(id)
        {
        }

        public override Prototype Clone()
        {
            // Shallow copy 
            return (Prototype)this.MemberwiseClone();
        }
    }

// 调用
        static void Main(string[] args)
        {
            ConcretePrototype1 p1 = new ConcretePrototype1("I");
            ConcretePrototype1 c1 = (ConcretePrototype1)p1.Clone();
            Console.WriteLine("Cloned: {0}", c1.Id);

            ConcretePrototype2 p2 = new ConcretePrototype2("II");
            ConcretePrototype2 c2 = (ConcretePrototype2)p2.Clone();
            Console.WriteLine("Cloned: {0}", c2.Id);

            // Wait for user 
            Console.Read();

        }

3，简单实现

 //简历
    class Resume : ICloneable
    {
        private string name;
        private string sex;
        private string age;

        private WorkExperience work;

        public Resume(string name)
        {
            this.name = name;
            work = new WorkExperience();
        }

        private Resume(WorkExperience work)
        {
            this.work = (WorkExperience)work.Clone();
        }

        //设置个人信息
        public void SetPersonalInfo(string sex, string age)
        {
            this.sex = sex;
            this.age = age;
        }
        //设置工作经历
        public void SetWorkExperience(string workDate, string company)
        {
            work.WorkDate = workDate;
            work.Company = company;
        }

        //显示
        public void Display()
        {
            Console.WriteLine("{0} {1} {2}", name, sex, age);
            Console.WriteLine("工作经历：{0} {1}", work.WorkDate, work.Company);
        }

        public Object Clone()
        {
            Resume obj = new Resume(this.work);

            obj.name = this.name;
            obj.sex = this.sex;
            obj.age = this.age;


            return obj;
        }

    }

    //工作经历
    class WorkExperience : ICloneable
    {
        private string workDate;
        public string WorkDate
        {
            get { return workDate; }
            set { workDate = value; }
        }
        private string company;
        public string Company
        {
            get { return company; }
            set { company = value; }
        }

        public Object Clone()
        {
            return (Object)this.MemberwiseClone();
        }
    }

          // 调用
         static void Main(string[] args)
        {
            Resume a = new Resume("大鸟");
            a.SetPersonalInfo("男", "29");
            a.SetWorkExperience("1998-2000", "XX公司");

            Resume b = (Resume)a.Clone();
            b.SetWorkExperience("1998-2006", "YY企业");

            Resume c = (Resume)a.Clone();
            c.SetWorkExperience("1998-2003", "ZZ企业");

            a.Display();
            b.Display();
            c.Display();

            Console.Read();

        }

4，关于原型模式的思考

1，深复制，浅复制
浅复制：被复制对象的所有的变量都含有与原来的对象相同的值，而所有的对其他对象的引用都指向原来的对象
深复制：把引用对象的变量指向复制过的新对象，而不是原有的被引用的对象
2，System的ICloneable()接口
MemberwiseClone() 方法：如果字段是值类型的，则对该字段进行逐位复制，如果字段是引用类型，则复制引用但是不复制引用对象，因此，原有对象及其复本引用同一对象