public async void lobbyInviteUpdate() { try { Thread.Sleep(1000); List <double> ls = new List <double>(); if (lobbyReady) { foreach (double sumId in lobbyInviteQuery) { await connection.Invite(sumId); ls.Add(sumId); } foreach (double sumId in ls) { lobbyInviteQuery.Remove(sumId); } } ls = null; } catch (Exception ex) { } }