Simple Factory模式实际上不是GoF 23个设计模式中的一员。

模式角色与结构：

示例代码：

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace CSharp.DesignPattern.SimpleFactoryPattern{    class Program // 类的修饰符有public和internal, 默认是internal    {        static void Main(string[] args)        {            SimpleFactory factory = new SimpleFactory();            IAthlete footballAthlete = factory.Create("Football");            IAthlete basketballAthlete = factory.Create("Baseketball");            footballAthlete.Run();            footballAthlete.Jump();            basketballAthlete.Run();            basketballAthlete.Jump();            Console.ReadLine();        }    }    interface IAthlete // 接口的修饰符有public和internal, 默认是internal    {        void Run(); // 接口成员默认修饰符为public，但是不能显式添加public        void Jump();    }    class FootballAthlete : IAthlete    {        public void Run()        {            Console.WriteLine("FootballAthlete Run...");        }        public void Jump()        {            Console.WriteLine("FootballAthlete Jump...");        }    }    class BaseketballAthlete : IAthlete    {        public void Run()        {            Console.WriteLine("BaseketballAthlete Run...");        }        public void Jump()        {            Console.WriteLine("BaseketballAthlete Jump...");        }    }    class SimpleFactory    {        public IAthlete Create(String athleteType)        {            if (athleteType == "Baseketball")            {                return new BaseketballAthlete();            }            else if (athleteType == "Football")            {                return new FootballAthlete();            }            else            {                return null;            }        }    }}