/// <summary>
 /// Find all answers to a question
 /// </summary>
 /// <param name="questionId"></param>
 /// <returns></returns>
 public List <AnswerDTO> Find(Guid questionId, Guid currentUser)
 {
     try
     {
         return(answerData.All(questionId, currentUser));
     }
     catch
     {
         return(null);
     }
 }