private void btnGenereDelete_Click(object sender, EventArgs e) { string genre = txtGenreName.Text; if (string.IsNullOrWhiteSpace(genre)) { MessageBox.Show("Please select Genre name from list.", "Error Message"); txtGenreName.Clear(); txtGenreName.Focus(); } else { try { var booking = new Booking(database); var result = booking.DeleteGenre((Genre) cboGenreGenre.SelectedItem); if (result) { cboGenreGenre.DataSource = booking.GetGenre().ToList(); cboGenreGenre.DisplayMember = "Name"; txtGenreName.Clear(); cboVideoGenre.DataSource = booking.GetGenre().ToList(); cboVideoGenre.DisplayMember = "Name"; } else { MessageBox.Show("Deletion not succesfull."); } } catch (VideoRentalException ex) { MessageBox.Show(String.Format("Error occured: {0} is not deleted succesfully", ex.Item.Name)); } catch (Exception ex) { MessageBox.Show(string.Format("Error Occoured: {0}", ex.Message)); } } }