廠方法與簡單工廠最大的區別，在於工廠方法將工廠進行了抽象，將實現邏輯延遲到工廠的子類。

using UnityEngine;

// 食物抽象類 public abstract class Food {   public  abstract void MenuFood(); }

// 西紅柿炒雞蛋這道菜 public class Tomato:Food {     public override void MenuFood()     {         Debug.Log("西紅柿菜");     } }

//辣椒炒飯 public class Pepper : Food {     public override void MenuFood()     {         Debug.Log("辣椒炒飯");     } }

// 抽象工廠類 public abstract class FoodFactory {     public abstract Food CreateFoodFactory(); }

// 西紅柿工廠類 public class TomatoFactory:FoodFactory {     public  override Food CreateFoodFactory()     {         return new Tomato();     } }

//辣椒炒飯工廠類 public class PepperFactory : FoodFactory {     public override Food CreateFoodFactory()     {         return new Pepper();     } }

// 客戶端呼叫

using UnityEngine;

public class Client : MonoBehaviour {     void Start ()     {         // 初始化做菜的兩個工廠（）         FoodFactory tomatoFactory = new TomatoFactory();         FoodFactory pepperFactory = new PepperFactory();

        // 開始做西紅柿         Food tomato = tomatoFactory.CreateFoodFactory();         tomato.MenuFood();

        //開始做辣椒炒飯         Food pepper = pepperFactory.CreateFoodFactory();         pepper.MenuFood();          } }