private void searchButton_Click(object sender, EventArgs e)
        {
            string search = searchTextBox.Text;
            IList <MediaItemData> list = persistenceController.ListMediaItemData(search);

            if (SearchCompleted != null)
            {
                MediaItemSearchEventArgs searchArgs = new MediaItemSearchEventArgs(list);
                SearchCompleted(this, searchArgs);
            }
        }