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：