原型模型

跟单例模型只创建一个对象相反，原型模型用于快速的创建相同的多个对象。

     public class prototype
    {
        private static prototype prototype = new prototype();

        public string sdbconnection = "";

        private prototype()
        {
            console.writeline("构造函数初始化！！");
        }

        public static prototype createinstance(string sdb)
        {
            prototype _prototype = (prototype)prototype.memberwiseclone();
            _prototype.sdbconnection = sdb;
            return _prototype;
        }
    }

main中调用：

    class program
    {
        static void main(string[] args)
        {
            prototype prototype = prototype.createinstance("server=1;database=a");
            prototype prototype1 = prototype.createinstance("server=2;database=b");
            prototype prototype2 = prototype.createinstance("server=3;database=c");
            prototype prototype3 = prototype.createinstance("server=4;database=d");

            console.writeline(prototype.sdbconnection);
            console.writeline(prototype1.sdbconnection);
            console.writeline(prototype2.sdbconnection);
            console.writeline(prototype3.sdbconnection);
            

            console.read();
        }
    }

输出结果：