// private void returntool_Click(object sender, EventArgs e) { var toolGet = PublicMethods.transferToInt(ToolNo.Text); if (toolGet != -1) { var stuffNo = stuffAndToolOnWork.FirstOrDefault(p => p.using_tool == toolGet); if (stuffNo != null) { toolWaiting.Add(toolGet); stuffAndToolOnWork.Remove(stuffAndToolOnWork.First(p => p.using_tool == toolGet)); MessageBox.Show(stuffNo.stuff + "号工人下班," + toolGet + "号工具已归还"); } else { MessageBox.Show("请勿重复下班!"); } } else { MessageBox.Show("工具号不正确!"); } }