private void DisplayBooksToScreen(List <Book> books)
{
bunifuCustomTextbox__list_selectedBooks.Text = "";
string printres = "";
foreach (Book bk in books)
{
printres += "Book ID: " + bk.BookID + " (" + bk.BookName + ")" + Environment.NewLine;
UpdateTotalPayment(double.Parse(bk.Price.ToString()) * ParameterManager.GetBookBorrowFeePercentage() / 100);
}
bunifuCustomTextbox__list_selectedBooks.Text = printres;
}