private void GetWords()
        {
            if (string.IsNullOrEmpty(_customVoiceModelID))
            {
                throw new ArgumentNullException("customVoiceModelID");
            }

            Console.WriteLine(string.Format("Calling GetWords({0})...", _customVoiceModelID));

            var results = _textToSpeech.GetWords(_customVoiceModelID);

            if (results != null && results.Count > 0)
            {
                Console.WriteLine("Custom words found.");
                foreach (CustomWordTranslation word in results)
                {
                    Console.WriteLine(string.Format("word: {0} | translation: {1}", word.Word, word.Translation));
                }
            }
            else
            {
                Console.WriteLine(string.Format("There are no words for custom voice model {0}...", _customVoiceModelID));
            }
        }