C# 通过多个ou组进行Active Directory身份验证

我正在尝试在min obv上遍历我们的ldap路径不想共享实时详细信息，但这里有一些代码，我想我可能必须循环我们的ou组，因为它们位于不同的文件夹中。当我查看节点时，你知道我将如何使用我已经创建的以下代码循环ou组吗

string logintype = rbAuthenticationType.SelectedItem.Value.ToString();
if (logintype == "Domain")
  {
     string adPath = "LDAP://ipaddress/DC=companynamee"; //Path to your LDAP directory server
            LdapAuthentication adAuth = new LdapAuthentication(adPath);

          try
            {
                  if (true == adAuth.IsAuthenticated(txtDomain.Text, txtUserName.Text, txtPassword.Text))
                {
                    string groups = adAuth.GetGroups();

                   //Create the ticket, and add the groups.

                    FormsAuthenticationTicket authTicket = new FormsAuthenticationTicket(1,
                              txtUserName.Text, DateTime.Now, DateTime.Now.AddMinutes(60), chkRememberMe.Checked, groups);

                    //Encrypt the ticket.
                    string encryptedTicket = FormsAuthentication.Encrypt(authTicket);

                    //Create a cookie, and then add the encrypted ticket to the cookie as data.
                    HttpCookie authCookie = new HttpCookie(FormsAuthentication.FormsCookieName, encryptedTicket);


                    //Add the cookie to the outgoing cookies collection.
                    Response.Cookies.Add(authCookie);

                    //You can redirect now.
                    Response.Redirect(FormsAuthentication.GetRedirectUrl(txtUserName.Text, false));
                }
                else
                {
                    lblerror.Text = "Authentication did not succeed. Check user name and password.";
                }
            }
            catch (Exception ex)
            {
                lblerror.Text = "Error authenticating. " + ex.Message;
            }
}