static object obj = new object();
        protected string locked()
        {
            CMLogger m_logger = CMLogger.GetInstance();
            string errcode = "0000";
            lock (obj)
            {
                string FindVPN_Address = System.Configuration.ConfigurationManager.AppSettings["VPN_Address"];
                string VPN_Address = "";

                string MasterVPN_Address = System.Configuration.ConfigurationManager.AppSettings["Master_VpnAddress"];
                #region
                if (FindVPN_Address == MasterVPN_Address)
                {
                    VPN_Address = FindVPN_Address;
                }
                else if (!SetParam(MasterVPN_Address))
                {
                    ChangeChannel changechannel = new ChangeChannel();
                    changechannel.ChangeVPN_Address(MasterVPN_Address);
                    VPN_Address = MasterVPN_Address;
                }
                else
                {
                    VPN_Address = FindVPN_Address;
                }

                if (SetParam(VPN_Address))
                {
                    int count = 0;
                    for (int i = 0; i < 2; i++)
                    {
                        if (SetParam(VPN_Address))
                        {
                            count++;
                            if (count == 2)
                            {
                                ChangeChannel channle = new ChangeChannel();
                                errcode = channle.ChangeBocChannel(ConfigurationManager.AppSettings["MonitorSiteName"]);
                            }
                        }
                        else
                            break;
                    }
                }
                return errcode;
                #endregion
            }
        }

public void ChangeVPN_Address(string NPN_Address)
        {
            CMLogger m_logger = CMLogger.GetInstance();
            try
            {

                Configuration config = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration("/", ConfigurationManager.AppSettings["MonitorSiteName"]);
                AppSettingsSection appseting = (AppSettingsSection)config.GetSection("appSettings");

                appseting.Settings["Bank_VPNRuntime"].Value = NPN_Address;
     
                config.Save();
                ConfigurationManager.RefreshSection("appSettings");
                config = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration("~");
                appseting = (AppSettingsSection)config.GetSection("appSettings");
                appseting.Settings["VPN_Address"].Value = NPN_Address;
                config.Save();
                ConfigurationManager.RefreshSection("appSettings");
            }
            catch (Exception ex)
            {
                m_logger.WriteDebugLog("保存失败【" + ex + "】");
            }
        }