protected void Page_Load(object sender, EventArgs e)
        {
            var listOfAllBooks = BooksHelper.GetAllBooks();

            resultsRepeater.DataSource = listOfAllBooks;
            resultsRepeater.DataBind();
        }
        protected void searchButton_Click(object sender, EventArgs e)
        {
            var keyWord = this.searchTitleTextBox.Text;

            var listOfAllBooks = BooksHelper.GetAllBooks();

            resultsRepeater.DataSource = listOfAllBooks.Where(b => b.Title.ToLower().Contains(keyWord.ToLower())).ToList();
            resultsRepeater.DataBind();
        }