c# - FB SDK fql is deprecated for versions v2.1 -

i have old c# desktop application uses fb sdk , fql query. have created new fb app , able login application. however, when trying create request like:

dynamic searchedposts = await fbclient.gettaskasync("/fql", searchparams); 

i getting error:

(oauthexception - #12) (#12) fql deprecated versions v2.1 , higher 

to debug issue went https://developers.facebook.com/tools/explorer/ , populated new token without selected. i've entered fql query , getting results expected. if replace populated token 1 coming desktop application receive error. therefore fql should not issue rather received token. idea on why populated token different , how fix it? thx.