NAV2018 RTC - How can i get recordset from SQL fulltext Search stored procedure?

Hi, in NAV2009 i get a Recordset from SQL fullsearch to NAV using ADO and Automations, now in NAV 2018 it seems i must use DotNet Vars, now i try use this example : https://www.erpsoftwareblog.com/2014/07/ado-net-integration-in-dynamics-nav-2013-how-well-does-nav-2013-handle-large-datasets-part-2/ and i have problem reproduce that, in the function GetENum it is necessary DotNet SubTypes System.Enum and System.Convert, but i can't find the Assembly where this are in? Perhaps it exists other example or way for realise my purpose, what i would do ist ca,, a stored procedure in Sql, and get back a data collection in a temp table. sorry for my bad english, and i hope you can understand my question/problem , thanks.