C#中接口的基本概念

        static void Main(string[] args)
        {
            using (CaryClass caryClass = new CaryClass())    //  IDisposeable接口用using来调用
            {
                caryClass.DoSomething();
            }
            CaryClass caryClass2 = new CaryClass();
            try
            {
                caryClass2.DoSomething();
            }
            finally                                         //  用finally来实现借口的调用
            {
                IDisposable disposable = caryClass2 as IDisposable;    
                if (disposable != null)
                    disposable.Dispose();
            }
            Console.ReadKey();
        }
    }
    public class CaryClass : IDisposable
    {
        public void DoSomething()
        {
            Console.WriteLine("Do some thing....");
        }
        public void Dispose()
        {
            Console.WriteLine("及时释放资源");
        }
    }