public static DAL.Tweet FromEntityToDal(TweetEntity tweet)
        {
            var dalTweet = new DAL.Tweet()
            {
                Date = tweet.DateCreation,
                Text = tweet.Message,
            };

            if (tweet.Identity != null)
                dalTweet.Identifier = tweet.Identity;

            return dalTweet;
        }
 public TweetEntity CreateTweet(TweetEntity tweet)
 {
     return FromDalToEntity(this.TweetDal.AddTweet(tweet.Message));
 }