建造者模式

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace KFC_MacDonald_Bulid
{
    class Program
    {
        //客户端代码
        static void Main(string[] args)
        {

            KFCBuilder kfc = new KFCBuilder();
            MealDirector kfcdirector = new MealDirector(kfc);
            kfcdirector.CreateMeal().Show();

            MBuilder m = new MBuilder();
            MealDirector mdirector = new MealDirector(m);
            mdirector.CreateMeal().Show();

        }

        //Meal类
        class Meal
        {
            protected List<Part> _parts = new List<Part>();
            public void AddPart(Part part)
            {
                _parts.Add(part);
            }

            public void Show()
            {
                foreach(Part part in _parts)
                {
                    part.Show();
                }
            }
        }

        //Part类
        abstract class Part
        {
            public Part()
            {}

            public abstract void Show();
        }

        class KFCBurger:Part
        {

            public KFCBurger():base()
            { }
            public override void Show()
            {
                Console.WriteLine("KFCBurger is ready");//输出"KFCBurger is ready"    
            }
        }

        class KFCChips : Part
        {
             public KFCChips():base()
            { }
            public override void Show()
            {
                Console.WriteLine("KFCChips is ready");//输出"KFCChips is ready"    
            }
        }

        class KFCDrink : Part
        {
            public KFCDrink()
                : base()
            { }
            public override void Show()
            {
                Console.WriteLine("KFCDrink is ready");//输出"KFCDrink is ready"    
            }
        }

        class MBurger:Part
        {
             public MBurger():base()
            { }
            public override void Show()
            {
                Console.WriteLine("MBurger is ready");//输出"KFCBurger is ready"    
            }
        }

        class MChips : Part
        {
            public MChips():base()
            { }
            public override void Show()
            {
                Console.WriteLine("MChips is ready");//输出"MChips is ready"    
            }
        }

        class MDrink : Part
        {
               public MDrink():base()
            { }
            public override void Show()
            {
                Console.WriteLine("MDrink is ready");//输出"MDrink is ready"    
            }
        }
        //抽象建造者
        abstract class MealBuilder
        {
            protected string _g;
            protected Meal _meal = new Meal();
            public MealBuilder()
            {  }
            public abstract void BuildBurger();
            public abstract void BuildChips();
            public abstract void BuildDrink();
            public Meal GetMeal()
            {
                return _meal;
            }
        }

        //具体建造者
        class KFCBuilder:MealBuilder
        {
             public KFCBuilder():base()
            { }

            public override void BuildBurger()
            {
                _meal.AddPart(new KFCBurger());
            }

            public override void BuildChips()
            {
                _meal.AddPart(new KFCChips());
            }

            public override void BuildDrink()
            {
                _meal.AddPart(new KFCDrink());
            }
        }

        class MBuilder : MealBuilder
        {
              public MBuilder(): base()
              {}
            

            public override void BuildBurger()
            {
                _meal.AddPart(new MBurger());
            }

            public override void BuildChips()
            {
                _meal.AddPart(new MChips());
            }

            public override void BuildDrink()
            {
                _meal.AddPart(new MDrink());
            }
        }
        //指挥者
        class MealDirector
        {
            private MealBuilder _builder;
            public MealDirector(MealBuilder builder)
            {
                _builder = builder;
            }

            public Meal CreateMeal()
            {
                _builder.BuildBurger();
                _builder.BuildChips();
                _builder.BuildDrink();

                return _builder.GetMeal();
            }
        }

    }
}