public static Dictionary<string, string> SearchADInfo(string adName)

        {

            string strTemp = "LDAP://xxx.xxx.com";

            DirectoryEntry entry = new DirectoryEntry(strTemp, ADUserName, ADPassword);

            entry.AuthenticationType = AuthenticationTypes.Secure;

            entry.RefreshCache();

            var src = new System.DirectoryServices.DirectorySearcher(entry);

            //(SAMAccountName=" + adName + ")

            src.Filter = "(SAMAccountName=" + adName + ")";

            src.PageSize = ;//   此参数可以任意设置，但不能不设置，如不设置读取AD数据为0~999条数据，设置后可以读取大于1000条数据。

            var result = src.FindOne();

            var ret = new Dictionary<string, string>();

            var de = result.GetDirectoryEntry();

            foreach (DictionaryEntry obj in result.Properties)

            {

                var value = string.Empty;

                foreach (Object obj2 in (ResultPropertyValueCollection)obj.Value)

                {

                    value += obj2.ToString();

                }

                ret.Add(obj.Key.ToString(), value.ToString());

            }

            return ret;

        }

    }