public override RecyclerView.ViewHolder OnCreateViewHolder(ViewGroup parent, int viewType)
        {
            itemView = LayoutInflater.From(parent.Context).Inflate(Resource.Layout.ClassSchedule_row, parent, false);
            MyClassScheduleViewHolder vh = new MyClassScheduleViewHolder(itemView, OnClick, mRecyclerView);

            return(vh);
        }
        public override void OnBindViewHolder(RecyclerView.ViewHolder holder, int position)
        {
            MyClassScheduleViewHolder onlinetestViewHolder = holder as MyClassScheduleViewHolder;

            Animation animation = AnimationUtils.LoadAnimation(ac, (position > lastPosition) ? Resource.Animation.slide_up1 : Resource.Animation.slide_down1);

            onlinetestViewHolder.ItemView.StartAnimation(animation);
            lastPosition = position;
        }