如何使用IIS API禁用IP訪問

public class IISAdministration {     private readonly ServerManager serverManager;     public IISAdministration()     {         serverManager = new ServerManager();     }      public IEnumerable<WorkerProcess> GetWorkerProcesses()     {         return serverManager.WorkerProcesses;     }      public IEnumerable<string> GetSiteNames()     {         foreach (var item in GetWorkerProcesses())         {             yield return item.AppPoolName;         }     }      public ConfigurationElementCollection GetIpSecurityCollection(string site)     {         return GetConfigurationElementCollection("system.webServer/security/ipSecurity", site);     }      public ConfigurationElementCollection GetConfigurationElementCollection(string sectionName, string site = "")     {         var config = serverManager.GetApplicationHostConfiguration();         ConfigurationSection section;         if (string.IsNullOrWhiteSpace(site))         {             section = config.GetSection(sectionName);         }         else         {             section = config.GetSection(sectionName, site);         }         return section.GetCollection();     }      public void CreateElement(ConfigurationElementCollection section, ConfigurationElement element)     {         section.Add(element);         serverManager.CommitChanges();     }      public void RemoveElement(ConfigurationElementCollection section, ConfigurationElement element)     {         section.Remove(element);         serverManager.CommitChanges();     }      public bool HasBlocked(string siteName, string ip)     {         var ipSecurityCollection = this.GetIpSecurityCollection(siteName);         for (int i = 0; i < ipSecurityCollection.Count; i++)         {             var element = ipSecurityCollection[i];             if ((string)element["ipAddress"] == ip)             {                 return true;             }         }         return false;     }      public void FreeIP(string siteName, string ip)     {         if (!HasBlocked(siteName, ip))         {             return;         }         var ipSecurityCollection = this.GetIpSecurityCollection(siteName);         for (int i = 0; i < ipSecurityCollection.Count; i++)         {             var element = ipSecurityCollection[i];             if ((string)element["ipAddress"] == ip)             {                 this.RemoveElement(ipSecurityCollection, element);                 break;             }         }     }      public void BlockIP(string siteName, string ip)     {         if (HasBlocked(siteName, ip))         {             return;         }         var ipSecurityCollection = this.GetIpSecurityCollection(siteName);         var element = ipSecurityCollection.CreateElement("add");         element["ipAddress"] = ip;         element["allowed"] = false;          ipSecurityCollection.Add(element);         serverManager.CommitChanges();     } }

var iisAdministration = new IISAdministration(); iisAdministration.BlockIP("", "192.0.0.1");