原型模式(Prototype)

    /// <summary>
    /// 班级
    /// </summary>
    [Serializable]
    public class Class
    {
        public int Num { get; set; }
        public string Remark { get; set; }
    }

    [Serializable]
    public class StudentPrototype
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public Class Class { get; set; }

        private StudentPrototype() { }

        private static readonly StudentPrototype _studentPrototype = null;

        static StudentPrototype()
        {
            _studentPrototype = new StudentPrototype()
            {
                Id = 0,
                Name = "复制",
                Class = new Class()
                {
                    Num = 100,
                    Remark = "100"
                }
            };
        }
        public static StudentPrototype CreateInstanceClone()
        {
            StudentPrototype studentPrototype = (StudentPrototype)_studentPrototype.MemberwiseClone();
            //这样就是深clone，如果没有这段，Class实例就是浅克隆
            studentPrototype.Class = new Class()
            {
                Num = 1,
                Remark = "软谋高级班"
            };

            return studentPrototype;
        }

        public static StudentPrototype CreateInstanceSerialize()
        {
            //序列化方式创建克隆，需要保证被克隆的对象具有 serialize 特性标签
            return SerializeHelper.DeepClone<StudentPrototype>(_studentPrototype);
        }
    }  

                Console.WriteLine("*****浅层次克隆Start**********");
                var box1 = StudentPrototype.CreateInstanceClone();
                Console.WriteLine($"Id={box1.Id} name={box1.Name}");
                var box2 = StudentPrototype.CreateInstanceClone();
                box2.Id = 10;
                box2.Name = "测试";
                Console.WriteLine($"Id={box2.Id} name={box2.Name}");
                Console.WriteLine("*****浅层次克隆End**********");

            {
                //对值类型的克隆修改值，不会影响克隆出的新对象的内容。但是引用类型的克隆有需要注意的点，Class是引用类型的值，具有Num和Remark俩个属性。如果使用下面的写法 box1.Class.Num=***，实际上源对象Class地址和克隆对象地址相同，修改一个相当于全部修改了，并没有实现我们想要的克隆效果
                Console.WriteLine("*****深层次克隆 Start**********");
                var box1 = StudentPrototype.CreateInstanceClone();
                box1.Class.Num = 10;
                box1.Class.Remark = "备注";
                Console.WriteLine($"Id={box1.Id} name={box1.Name} ClassNum={box1.Class.Num } Remark={box1.Class.Remark }");
                var box2 = StudentPrototype.CreateInstanceClone();
                box2.Id = 10;
                box2.Name = "测试";
                Console.WriteLine($"Id={box2.Id} name={box2.Name} ClassNum={box2.Class.Num } Remark={box2.Class.Remark }");
                Console.WriteLine("*****深层次克隆 End**********");
            }

   {
                //使用序列化的方式进行克隆原理，因为深层次克隆的主要问题是引用类型克隆时还是相同地址
                //我们先将初始对象序列化，在将得到的值进行反序列化，这样便能保证生成的对象存在不同的地址引用
                Console.WriteLine("*****深层次克隆2 序列化Start**********");
                var box1 = StudentPrototype.CreateInstanceSerialize();
                box1.Class.Num = 10;
                box1.Class.Remark = "备注";
                Console.WriteLine($"Id={box1.Id} name={box1.Name} ClassNum={box1.Class.Num } Remark={box1.Class.Remark }");
                var box2 = StudentPrototype.CreateInstanceSerialize();
                box2.Id = 10;
                box2.Name = "测试";
                Console.WriteLine($"Id={box2.Id} name={box2.Name} ClassNum={box2.Class.Num } Remark={box2.Class.Remark }");
                Console.WriteLine("*****深层次克隆2  序列化End**********");
            }