public void Removebook(BookData bookData)
        {
            IList <IUser> usersWithThisBook = GetUserWithThisBook(book);

            if (usersWithThisBook.Count == 0)
            {
                DialogResult dialogResult = MessageBox.Show("Are You Sure ?", "Delete", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
                if (dialogResult == DialogResult.Yes)
                {
                    _libraryPresenter.Container.books.Remove(book);
                    _libraryPresenter.Container.Save();
                    MessageBox.Show("Removed");
                    bookData.Close();
                }
                else if (dialogResult == DialogResult.No)
                {
                    //Cancel Delete
                }
            }
            else
            {
                DialogResult dialogResult = MessageBox.Show(GetUserForDisplay(usersWithThisBook), "Delete", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
        }