public void StartCommand()
        {
            IEnumerable e = new EnumerableThing(10);

            foreach (int i in e)
            {
                Console.WriteLine(i);
            }

            Console.ReadKey();
        }
        public void StartCommand()
        {
            foreach (char ch in "Hello world")
            {
                Console.Write(ch);
            }

            EnumerableThing e = new EnumerableThing(10);

            foreach (int i in e)
            {
                Console.WriteLine(i);
            }

            Console.ReadKey();
        }