private void Delete_Click(object sender, EventArgs e) { DialogResult confirmation = MessageBox.Show("Are you sure?", "sure?", MessageBoxButtons.YesNo); if (confirmation == DialogResult.Yes) { try { ListViewItem item = listViewActivity.SelectedItems[0]; SomerenLogic.Activity_Service activity_Service = new Activity_Service(); activity_Service.Delete(int.Parse(item.Text)); } catch (ArgumentOutOfRangeException) { MessageBox.Show("Select an item"); return; } } showPanel("Activity"); }