public string addNewComment(Guid userId, string message, Guid roomId)
        {
            DataClassesContextDataContext db = new DataClassesContextDataContext();

            GroopsMessages thisMessage = new GroopsMessages();

            thisMessage.Content = message;
            thisMessage.ID      = Guid.NewGuid();
            thisMessage.RoomId  = roomId;
            thisMessage.UserId  = userId;
            thisMessage.Created = DateTime.Now;

            db.GroopsMessages.InsertOnSubmit(thisMessage);

            try
            {
                db.SubmitChanges();
                return(userIdToUserName(userId));
            }
            catch (Exception e)
            {
                return(null);
            }
        }
        public string addNewComment(Guid userId, string message, Guid roomId)
        {
            DataClassesContextDataContext db = new DataClassesContextDataContext();

            GroopsMessages thisMessage = new GroopsMessages();

            thisMessage.Content = message;
            thisMessage.ID = Guid.NewGuid();
            thisMessage.RoomId = roomId;
            thisMessage.UserId = userId;
            thisMessage.Created = DateTime.Now;

            db.GroopsMessages.InsertOnSubmit(thisMessage);

            try
            {

                db.SubmitChanges();
                return userIdToUserName(userId);
            }
            catch (Exception e)
            {

                return null;
            }

        }