DataTable dtUser = GetEmptyDT();

            Dictionary<DirectoryEntry, string> test1 = GetUserAndGroup(clsConst.enumADName.AD_1);

            foreach (DirectoryEntry deUser in test1.Keys)

            {

                string groupname = test1[deUser];

                string sAMAccountName = GetProperty(deUser, "sAMAccountName");

                string mail = GetProperty(deUser, "mail");

                string department = GetProperty(deUser, "Department");

                string displayName = GetProperty(deUser, "displayName");

                string givenName = GetProperty(deUser, "givenName");

                string sn = GetProperty(deUser, "sn");

                DataRow dr = dtUser.NewRow();

                dr["ADName"] = clsConst.enumADName.AD_1;

                dr["GroupName"] = groupname;

                dr["LoginName"] = sAMAccountName;

                dr["Department"] = department;

                dr["MailAddress"] = mail;

                dr["DisplayName"] = displayName;

                dr["FirstName"] = givenName;

                dr["LastName"] = sn;

                dtUser.Rows.Add(dr);

            }

            ExportLog(dtUser, "UserInformation_log", ConfigurationManager.AppSettings["UserInformationPath"]);

        public static Dictionary<DirectoryEntry, string> GetUserAndGroup(string ADName)

        {

            string[] GroupName = { string.Empty };

            string path = string.Empty;

            string username = string.Empty;

            string password = string.Empty;

            if (ADName.Equals(clsConst.enumADName.AD_1))

            {

                path = ConfigurationManager.AppSettings["1Path"];

                username = ConfigurationManager.AppSettings["1UserName"];

                password = ConfigurationManager.AppSettings["1Password"];

                GroupName = ConfigurationManager.AppSettings["1Groups"].Split(',');

            }

            if (ADName.Equals(clsConst.enumADName.AD_2))

            {

                path = ConfigurationManager.AppSettings["2Path"];

                username = ConfigurationManager.AppSettings["2UserName"];

                password = ConfigurationManager.AppSettings["2Password"];

                GroupName = ConfigurationManager.AppSettings["2Groups"].Split(',');

            }

            if (ADName.Equals(clsConst.enumADName.AD_3))

            {

                path = ConfigurationManager.AppSettings["3Path"];

                username = ConfigurationManager.AppSettings["3UserName"];

                password = ConfigurationManager.AppSettings["3Password"];

                GroupName = ConfigurationManager.AppSettings["3Groups"].Split(',');

            }

            List<SearchResult> results = new List<SearchResult>();

            DirectoryEntry de = GetDirectoryObject(ADName);

            DirectorySearcher deSearch = new DirectorySearcher();

            deSearch.SearchRoot = de;

            string strFilter = string.Empty;

            if (GroupName.Length <= )

            {

                return null;

            }

            strFilter = "(&(objectClass=group){0}(cn=" + GroupName[] + "){1})";

            string s1 = string.Empty;

            string s2 = string.Empty;

            if (GroupName.Length > )

            {

                s1 = "(|";

                for (int i = ; i < GroupName.Length; i++)

                {

                    s2 += "(cn=" + GroupName[i] + ")";

                }

                s2 += ")";

            }

            strFilter = string.Format(strFilter, s1, s2);

            deSearch.Filter = strFilter;

            deSearch.SearchScope = SearchScope.Subtree;

            SearchResultCollection searchResults = deSearch.FindAll();

            Dictionary<DirectoryEntry, string> groupAndUser = new Dictionary<DirectoryEntry, string>();

            List<string> dnstr = new List<string>();

            foreach (SearchResult searchResult in searchResults)

            {

                DirectoryEntry deGroup = new DirectoryEntry(searchResult.Path, username, password, AuthenticationTypes.Secure);

                System.DirectoryServices.PropertyCollection pcoll = deGroup.Properties;

                int n = pcoll["member"].Count;

                for (int l = ; l < n; l++)

                {

                    DirectoryEntry deUser = new DirectoryEntry(path + "/" + pcoll["member"][l].ToString(), username, password, AuthenticationTypes.Secure);

                    string dn = deUser.Properties["distinguishedName"][].ToString();

                    if (!dnstr.Contains(dn))

                    {

                        dnstr.Add(dn);

                        groupAndUser.Add(deUser,deGroup.Name.Remove(,));

                    }

                }

            }

            return groupAndUser;

        }