public static Task<LobbyOperationResponse> AdmitLobbyParticipantsAsync(this LobbyManager mgr, IEnumerable<ConversationParticipant> lobbyParticipants, LobbyAdmitOptions options) { return Task<LobbyOperationResponse>.Factory.FromAsync(mgr.BeginAdmitLobbyParticipants, mgr.EndAdmitLobbyParticipants, lobbyParticipants, options, null); }