簡單工廠模式，顧名思義就是抽象工廠的簡單版~

共有三個環節~ 分別是 抽象產品、具體產品、生產產品~

學習目標: 簡單工廠模式的概念及實務

學習難度: ☆☆☆

using System;

namespace ConsoleApp1
{
    abstract class Game //抽象類別定義產品概念
    {
        public abstract string Name { get; set; }

        public abstract int Price { get; set; }

        public abstract void Demo();
    }

    class AOE3 : Game //描述產品的細節
    {
        public override string Name { get; set; } = "AOE3";

        public override int Price { get; set; } = 300;

        public override void Demo()
        {
            Console.WriteLine("AOE3 is Playing");
        }
    }

    static class GameFactory //工廠生產中...
    {
        public static Game GetGame(string name) //型別是Game，因為要生產Game，所以回傳Game
        {
            switch (name)
            {
                case "AOE3":

                return new AOE3();

                default:

                throw new Exception("My factory doesn't' has this game") ;
            }
        }
    }

    static class MainProgram //算是Clinet端?!
    {
        public static void Main()
        {
            Game AOE3 = GameFactory.GetGame("AOE3");

            AOE3.Demo();
        }
    }
}

參考資料:

https://raychiutw.github.io/2019/%E9%9A%A8%E6%89%8B-Design-Pattern-3-%E7%B0%A1%E5%96%AE%E5%B7%A5%E5%BB%A0%E6%A8%A1%E5%BC%8F-Simple-Factory-Pattern/