//增加用户
string dom ="ldap://intdomain.com/cn=users,dc=intdomain,dc=com";
system.directoryservices.directoryentry entry1 = new system.directoryservices.directoryentry(dom);
directoryentries myentries = entry1.children;
directoryentry mydirectoryentry = myentries.add("cn=myuser", "user");
mydirectoryentry.properties["givenname"].value="test";
mydirectoryentry.properties["sn"].value="htestsn";