How add age_range to Graph Api

var apptoken = result.access_token;
dynamic parameters = new ExpandoObject();
parameters.q = "uk";
parameters.limit="5000";
parameters.offset = "0";
parameters.type = "adgeolocation";
parameters.type = "user";
parameters.q = "Peter";

var searchedPlaces = fbClient.Get("/search", parameters);
var vihod = (from i in (IEnumerable<dynamic>)searchedPlaces.data
             select new
             {
                 i.name,
                 i.id
             }).ToList();