建造者模式

一、建造者模式适用于构建一些内部工作流程一致，实现方式不同的对象。比如说我们每个人每天基本上是用餐四次（早、中、晚和宵夜，但也有不同的）。

这里我们不考虑特殊的情况，来说明建造者模式的构建。

/// <summary>
    /// 定义了每天必须完成项目的抽象接口
    /// </summary>
    public interface IBuild
    {
        void BuildMorning();

        void BuildNoon();

        void BuildEvening();

        void BuildNight();
    }

  /// <summary>
    /// 方案实施者
    /// </summary>
    public class Director
    {
        private IBuild _build;

        public Director(IBuild build) {
            this._build = build;
        }

        public void Build() {
            this._build.BuildMorning();
            this._build.BuildNoon();
            this._build.BuildEvening();
            this._build.BuildNight();
        }
    }

 /// <summary>
    /// 方案A
    /// </summary>
    public class ProjectA:IBuild
    {

        #region IBuild 成员

        public void BuildMorning()
        {
            Console.WriteLine("早餐：包子");
        }

        public void BuildNoon()
        {
            Console.WriteLine("午餐：辣椒炒肉");
        }

        public void BuildEvening()
        {
            Console.WriteLine("晚餐：红烧豆腐");
        }

        public void BuildNight()
        {
            Console.WriteLine("宵夜：无");
        }

        #endregion
    }

/// <summary>
    /// 方案B
    /// </summary>
    public class ProjectB:IBuild
    {
        #region IBuild 成员

        public void BuildMorning()
        {
            Console.WriteLine("早餐：汤粉");
        }

        public void BuildNoon()
        {
            Console.WriteLine("午餐：辣椒炒肉");
        }

        public void BuildEvening()
        {
            Console.WriteLine("晚餐：西红柿炒蛋");
        }

        public void BuildNight()
        {
            Console.WriteLine("宵夜：包子");
        }

        #endregion
    }

 /// <summary>
        /// 客户端调用
        /// </summary>
        /// <param name="args"></param>
        static void Main(string[] args)
        {
            IBuild buildA = new ProjectA();
            IBuild buildB = new ProjectB();

            Director direct = new Director(buildA);
            direct.Build();

            direct = new Director(buildB);
            direct.Build();

            Console.ReadKey();
        }