static void Main(string[] args)
        {
            //FactoryClient clnt = new FactoryClient();
            //clnt.Process();
            //Console.Read();

            //LinqClient clnt = new LinqClient();

            //DataStructure
            //NodeClient clnt = new NodeClient();
            //            clnt.Process();
            //OOP Test
            client clnt = new client();
            clnt.Process();
            Console.ReadLine();
        }
        static void Main(string[] args)
        {
            //FactoryClient clnt = new FactoryClient();
            //clnt.Process();
            //Console.Read();

            //LinqClient clnt = new LinqClient();


            //DataStructure
            //NodeClient clnt = new NodeClient();
            //            clnt.Process();
            //OOP Test
            client clnt = new client();

            clnt.Process();
            Console.ReadLine();
        }