public override RecyclerView.ViewHolder OnCreateViewHolder(ViewGroup parent, int viewType)
        {
            View itemView = LayoutInflater.From(parent.Context).
                            Inflate(Resource.Layout.SpeakerCardView, parent, false);

            SpeakerViewHolder vh = new SpeakerViewHolder(itemView, OnClick);

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

            var imageBitmap = GetImageBitmapFromUrl(listOfSpeakers[position].Photo);

            vh.speakerPhotoImageView.SetImageBitmap(imageBitmap);

            vh.speakerNameTextView.Text = listOfSpeakers[position].Name;
        }