private void btn_delete_Click(object sender, EventArgs e) { Guid id = ((contacts)lst_list.SelectedItem).id; BusinessLogicLayer.BLL BLL = new BusinessLogicLayer.BLL(); int ReturnValues = BLL.deleteContact(id); if (ReturnValues > 0) { MessageBox.Show("Successful!! Record Deleted", "Info", MessageBoxButtons.OK, MessageBoxIcon.Information); addList(); } else { MessageBox.Show("Something wrong", "Info", MessageBoxButtons.OK, MessageBoxIcon.Information); } }