简单工厂

简单工厂：

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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks;   namespace AdapterDemo {     class Program     {         static void Main(string[] args)         {             //通过工厂创建一个产品的实例             // 客户想点一个西红柿炒蛋                    Food food1 = FoodSimpleFactory.CreateFood("西红柿炒蛋");             food1.Print();               // 客户想点一个土豆肉丝             Food food2 = FoodSimpleFactory.CreateFood("土豆肉丝");             food2.Print();               Console.Read();         }     }       /// <summary>     /// 菜抽象类     /// </summary>     public interface Food     {         // 输出点了什么菜         string Print();     }       /// <summary>     /// 西红柿炒鸡蛋这道菜     /// </summary>     public class TomatoScrambledEggs : Food     {         public string Print()         {             Console.WriteLine("一份西红柿炒蛋！");             return string.Empty;         }     }       /// <summary>     /// 土豆肉丝这道菜     /// </summary>     public class ShreddedPorkWithPotatoes : Food     {         public string Print()         {             Console.WriteLine("一份土豆肉丝");             return string.Empty;         }     }       /// <summary>     /// 简单工厂类, 负责 炒菜     /// </summary>     public class FoodSimpleFactory     {         public static Food CreateFood(string type)         {             Food food = null;             if (type.Equals("土豆肉丝"))             {                 food = new ShreddedPorkWithPotatoes();             }             else if (type.Equals("西红柿炒蛋"))             {                 food = new TomatoScrambledEggs();             }               return food;         }     } }