c#访问LDAP方法(未调试, 不知是否可用)

using System;using System.Text;using System.Net;using System.Security.Permissions;using System.DirectoryServices;using System.DirectoryServices.Protocols;using SDS = System.DirectoryServices;namespace Microsoft.Samples.DirectoryServices{    class A    {        static LdapConnection ldapConnection;        static string ldapServer;        static NetworkCredential credential;        static string targetOU; // dn of an OU. eg: "OU=sample,DC=fabrikam,DC=com"        // object DNs that are created in the sample        static string ou1, ou2, ou3;        public static void Main(string[] args)        {            try             {                 if (!GetParameters(args))                 {                     return;                 }                EnumerateOU();                Console.WriteLine("\r\nApplication Finished Successfully!!!");             }             catch (System.Exception ex)             {              }        }        public static bool GetParameters(string[] args)        {            if (args.Length != 5)            {                //("LDAP://127.0.01/ou=user,dc=companyname,dc=com", "cn=sysuser,ou=systemaccounts,dc=companyname,dc=com", "sysuser", AuthenticationTypes.None);                Console.WriteLine("Usage: App.exe <ldapServer> <user> <pwd> <targetOU>");                // return error                 return false;            }            // initialize variables            ldapServer = args[0];            credential = new NetworkCredential(args[1], args[2], args[3]);            targetOU = args[4];            // return success            return true;        }        public static void EnumerateOU()        {            DirectoryEntry entry = new DirectoryEntry("LDAP://127.0.01/ou=user,dc=companyname,dc=com", "cn=sysuser,ou=systemaccounts,dc=companyname,dc=com", "sysuser", AuthenticationTypes.None);            try            {                object native = entry.NativeObject;                DirectorySearcher searcher = new DirectorySearcher(entry);                searcher.Filter = "(objectClass=account)";                searcher.PropertiesToLoad.Add("cn");                SearchResultCollection ret = searcher.FindAll();                foreach (SearchResult sr in ret)                {                    foreach (string key in sr.Properties.PropertyNames)                    {                        foreach (object val in sr.Properties[key])                        {                            string strTmp = key + " = " + val;                            Console.WriteLine(strTmp);                        }                    }                }            }            catch (System.Exception ex)            {            }            return;        }    }}