c# - Information about the domain could not be retrieved (1355). Not able to read values in LINQ collection -

i trying users name active directory using pricipalcontext. can able results on ienumurable variable principalsearchresult using following code. not able read results under principalsearchresult.

while trying read results principalsearchresult , populate error message principaloperation exception unhandled users code: information domain not retrieved (1355).

i don't know error , unable read values in search result.

here code:

 principalcontext oucontext = new principalcontext(contexttype.domain, ad.serverdomain, ad.ldapuser, ad.ldappasswoprd);  userprincipalex userpricipalex = new userprincipalex(oucontext);   principalsearcher mysearch = new principalsearcher(userpricipalex);  mysearch.queryfilter = userpricipalex;   ienumerable<userprincipalex> principalsearchresult = mysearch.findall().cast <userprincipalex>();   var s = (from user in oprincipalsearchresult      //here getting exception                                    select new user                                    {                                     displayname=user.displayname,                                     emailaddress=user.emailaddress                                      .                                      .                                      .                                     }); 

how can resolve error , read values in ienumurable collection without exception.

the domain users built-in group have ad users, can query ad users details shown below. here storing details in datatable. can store them list of custom business objects. hope helps!!

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string groupname="domain users"; using (groupprincipal objgroupprincipal = getgroupprincipal(fqdn, aousername, aopassword, groupname))             {                 if (objgroupprincipal != null)                     using (principalsearchresult<principal> objprincipalsearchresult = objgroupprincipal.getmembers(false))                     {                         objprincipalsearchresult.tolist<principal>().findall(p => p != null).cast<userprincipal>().tolist<userprincipal>()                             .foreach(delegate(userprincipal objuserprincipal)                             {                                 datarow druser = dtusers.newrow();                                 druser["displayname"] = objuserprincipal.displayname;                                 druser["username"] = objuserprincipal.samaccountname;                                 druser["domain"] = fqdn;                                 druser["accountactive"] = objuserprincipal.isaccountlockedout();                                 druser["firstname"] = "";                                 druser["initials"] = objuserprincipal.middlename;                                 druser["lastname"] = objuserprincipal.surname;                                 druser["mail"] = objuserprincipal.emailaddress;                                 druser["telephonenumber"] = objuserprincipal.voicetelephonenumber;                                 druser["lastlogon"] = convert.tostring(objuserprincipal.lastlogon);                                 druser["aduserpath"] = convert.tostring(objuserprincipal.distinguishedname);                                                                    druser["accexpirydate"] = convert.tostring(objuserprincipal.accountexpirationdate);                                 druser["pwdexpirydate"] = "";                                 dtusers.rows.add(druser);                             });                       }             } 

and sub methods are

public static groupprincipal getgroupprincipal(string fqdn, string aousername, string aopassword, string groupname)     {         groupprincipal objgroupprincipal = null;         objgroupprincipal = groupprincipal.findbyidentity(getprincipalcontext(fqdn, aousername, aopassword), identitytype.samaccountname, groupname);         return objgroupprincipal;     } public static principalcontext getprincipalcontext(string fqdn, string aousername, string aopassword)     {         principalcontext objprincipalcontext = null;        objprincipalcontext = new principalcontext(contexttype.domain, fqdn, aousername, aopassword);         return objprincipalcontext;     }