public void Show(string[] args)
        {
            if (args.Length > 0)
            {
                _uc.Count_words_in_file(args[0]);
            }
            else
            {
                Console.Write("Text eingeben: ");
                var text = Console.ReadLine();
                if (string.IsNullOrWhiteSpace(text))
                {
                    return;
                }

                _uc.Count_words(text);
            }
        }