how can I get information from Riot Sharp about the rank?

[Womba306]

idk, i try all syntax, but no one work.
Help me pls with my problem

[AoshiW]

1. use prerelease version 5.0.0-alpha
2. btw it's hard to tell what rank info you want, but I'm going to assume you mean summoner rank

var rank = await api.League .GetLeagueEntriesBySummonerAsync(region, summonerId);