c# - How do I apply a new group to a user in an OU in Microsoft Active Directory -

my system has users login register/renew accounts. in end set group , check if there. changed our system , move users new ou if renewing (already in ou).

what want apply new group user when renew or register. resulting in user being member of 2 groups.

directoryentry instructorroot = new directoryentry(ldap_ou_dir); //root binding instructorroot.authenticationtype = authenticationtypes.signing | authenticationtypes.secure | authenticationtypes.sealing | authenticationtypes.fastbind;  directoryentry instructor = new directoryentry(ldaproot); //default value instructor.authenticationtype = instructorroot.authenticationtype;  /*here im trying testgroup group*/ directoryentry instructorgroup = instructorroot.children.find("cn="+testgroup, "group"); instructorgroup.authenticationtype = instructorroot.authenticationtype; 

---

instructor = instructorroot.children.add("cn=" + hfuser.value, "user"); instructor.commitchanges();  instructor.properties["userprincipalname"].value = hfuser.value + "@" + ldaproot; instructor.properties["samaccountname"].value = hfuser.value; //login name instructor.commitchanges();  /*here im trying add insttest group user*/  instructorgroup.properties["member"].add(instructor.properties["distinguishedname"].value); //add instructors group instructorgroup.commitchanges(); //commit changes can set primary group next instructorgroup.close();//close  instructor.properties["primarygroupid"].value = 109929; //set primarygroup instructors instructor.commitchanges(); 

private void addmembertogroup(string bindstring, string newmember) {     try     {         directoryentry ent = new directoryentry(bindstring);         ent.properties["member"].add(newmember);         ent.commitchanges();     }     catch (exception e)     {         // error catching stuff here         return;     } } 

where bindstring string contains full directory new group want add users to.

and

newmember string obtained user object's .properties["distinguishedname"].value.tostring() method.