static int VAR_ProcessIdOfIpeCmd = 0;

private void Task_StopFirmwareFlashing()
{
  // 刪除所紀錄的Process與其Child Process
  RecursiveTask_KillProcessAndChildren(VAR_ProcessIdOfIpeCmd);
}

private void Task_StopFirmwareFlashing()
{
  // 刪除所紀錄的Process與其Child Process
  RecursiveTask_KillProcessAndChildren(VAR_ProcessIdOfIpeCmd);
}

private static void RecursiveTask_KillProcessAndChildren(int pid)
{
  // 這是一個遞迴的程序，會針對所有以傳入之pid為parent Process
  // 的Process，再重複遞迴找尋，直到所有最終沒有任何Procee以其為parent
  // 的Process, 將之進行關閉 Process
  // -------------------------------------
  // 無法刪除(關閉) 'system idle process'
  if (pid == 0)
  {
    return;
  }
  // 找尋所有之Child Process
  ManagementObjectSearcher searcher = new ManagementObjectSearcher
    ("Select * From Win32_Process Where ParentProcessID=" + pid);
  ManagementObjectCollection moc = searcher.Get();
  // 對每一個Child Process 再遞迴方式找尋一次
  foreach (ManagementObject mo in moc)
  {
    RecursiveTask_KillProcessAndChildren(Convert.ToInt32(mo["ProcessID"]));
  }
  // 沒有Child Process時，嘗試刪除該Process
  try
  {
    Process proc = Process.GetProcessById(pid);
    proc.Kill();
  }
  catch (ArgumentException)
  {
    // Process already exited.
  }
}