1.回顾单例模式(Singleton Pattern)
设置一个静态的构造函数，让Student仅能被new一个，给所有调用返回一个相同的实例
StudentPrototype类代码如下：
using System; using System.Threading; namespace Prototype { class StudentPrototype { public String Name="kxy"; private StudentPrototype() { Thread.Sleep(2000); Console.WriteLine("执行StudentPrototype构造函数"); } private static StudentPrototype _studentPrototype=null; static StudentPrototype() { _studentPrototype = new StudentPrototype(); } public static StudentPrototype GetStudent() { return _studentPrototype; } } }
Program代码如下：
using System; namespace Prototype { class Program { static void Main(string[] args) { StudentPrototype studentPrototype1 = StudentPrototype.GetStudent(); studentPrototype1.Name = "flt"; StudentPrototype studentPrototype2 = StudentPrototype.GetStudent(); studentPrototype2.Name = "wzz"; StudentPrototype studentPrototype3 = StudentPrototype.GetStudent(); StudentPrototype studentPrototype4 = StudentPrototype.GetStudent(); Console.Read(); } } }
因为studentPrototype1和studentPrototype2是调用了同个实例，所以
当执行studentPrototype2.Name = "wzz"时，studentPrototype1的Name属性也会变成wzz
同理，studentPrototype3、studentPrototype4也是使用这个实例
2.原型模式（Prototype Pattern）
原文：https://www.cnblogs.com/wskxy/p/9228272.html