private void addComments()
 {
     _scroll.ContentSize = new SizeF(320, 68 * 5);
     for (int i = 0; i < 5; i++)
     {
         MLSingleComment com = new MLSingleComment(new CGRect(0, i * 68, 320, 68));
         _scroll.Add(com);
     }
 }
        void addMoreComments(int idx)
        {
            if (_postsList != null)
            {
                for (int i = idx; i < _postsList.Count; i++)
                {
                    MLSingleComment com = new MLSingleComment(new CGRect(0, i * 68, 320, 68));
                    com.CommentText = _postsList [i].post.text;
                    com.NameText    = _postsList [i].post.name + " " + _postsList [i].post.lastname;
                    com.TimeText    = _postsList [i].post.created_at.ToString();
                    if (_postsList [i].userImage != null)
                    {
                        com.ImageBytes = _postsList [i].userImage;
                    }
                    _postsList [i].PropertyChanged += (sender, e) => {
                        com.ImageBytes = (sender as MLearning.Core.ViewModels.MainViewModel.post_with_username_wrapper).userImage;
                    };
                    _scroll.Add(com);
                }
            }

            //resize scroll
            _scroll.ContentSize = new SizeF(320, 68 * _postsList.Count);
        }