private int DeleteGenre() { try { string errMsg = String.Empty; if (cboGenresGenre.SelectedIndex < 0) { errMsg = "No genre selected" + Environment.NewLine; } if (cboGenresGenre.SelectedIndex < 0) { MessageBox.Show(errMsg); return(-1); } var genre = new Genre() { Id = ((ComboClass)cboGenresGenre.SelectedItem).Id, Name = ((ComboClass)cboGenresGenre.SelectedItem).Name }; booking.DeleteGenre(genre); FillGenres(); FillVideos(); FillAvailbaleVideos(); return(cboGenresGenre.Items.Count - 1); } catch (VideoRentalException ex) { MessageBox.Show(ex.Message); return(Int32.MinValue); } catch { return(-1); } }