class Program

    {

        static void Main(string[] args)

        {

            Console.WriteLine("Hello World!");

            Db person = new Db { Name = "Tom" }

              .Run()

              .Sing()

              .Swim();

        }

        public class Db

        {

            public string Name { get; set; }

            public Db Run()

            {

                Console.WriteLine("Run");

                return this;

            }

            public Db Swim()

            {

                Console.WriteLine("Swim");

                return this;

            }

            public Db Sing()

            {

                Console.WriteLine("Sing");

                return this;

            }

        }

    }

/// <summary>

        /// 链式编程示例3  对比

        /// </summary>

        private void Example3()

        {

            //链式代码

            Person person = new Person { Name = "Tom" }

                .Run()

                .Sing()

                .Swim()

                .Run()

                .Sing()

                .Swim();

            //常规代码

            Person person2 = new Person();

            person2.Run();

            person2.Sing();

            person2.Swim();

            person2.Run();

            person2.Sing();

            person2.Swim();

        }