public void NoUSB_AutoDownLoad()
        {
            string[] array = new string[3];
            string Receive_CompactFile;

            if (NoUSBlist.Count != 0)
            {
                for (int i = 0; i < NoUSBlist.Count; i++)
                {
                    Receive_CompactFile = NoUSBlist[i].ToString();
                    array = Receive_CompactFile.Split('\a');

                    if (id == array[0])
                    {
                        char[] delimiterChars = { '\\' };
                        string[] words = array[1].Split(delimiterChars);
                        Server_File = words[words.Length - 1];

                        multiFileName[i] = Server_File;
                    }
                }

                if (id == array[0])
                {
                    if (System.IO.File.Exists(usbpath + USB_Path + id + " - " + Server_File))        //USB_Path = "SchoolInteligentUSB\\FileRoom\\"
                        return;

                    else
                    {
                        string UpdateFile = id + " - " + Server_File;

                        System.Windows.Forms.DialogResult dr = System.Windows.Forms.MessageBox.Show("서버에 업데이트된 파일이 있습니다. 받으시겠습니까?", "알림", System.Windows.Forms.MessageBoxButtons.OKCancel, System.Windows.Forms.MessageBoxIcon.Information);

                        if (dr == System.Windows.Forms.DialogResult.OK)
                        {
                            DownloadFile(multiFileName);

                            WindowsXml useruixml = new WindowsXml();
                            useruixml.NoUsbDownLoadXML_Write(UpdateFile);

                            Process.Start(usbpath + "SchoolInteligentUSB\\FileRoom");

                            MessageBox.Show("다운로드가 완료되었습니다.");
                        }
                    }
                }
            }
            else
                return;
        }