适配器模式

1.使用组合委托一个黑盒实例对象来实现接口；适配器委托目标类作为构造函数，并委托它来实现接口

2.Code:

class Program
    {
        static void Main(string[] args)
        {
            IExpectedInterface dependency = new Adapter(new TargetClass());
            Console.WriteLine(dependency.MethodA());
            Console.ReadLine();   //输出协作类的方法结果
        }

        public interface IExpectedInterface
        {
            int MethodA();
        }

        public class Adapter : IExpectedInterface
        {
            public Adapter(TargetClass targetClass)
            {
                this.target = targetClass;
            }

            public int MethodA()
            {
                return target.MethodB();
            }

            private TargetClass target;
        }

        public class TargetClass
        {
            public int MethodB()
            {
                return 100;
            }
        }
    }