public static Task LockConferenceAsync(this ConferenceSession session,
                                        LockConferenceOptions options)
 {
     return(Task.Factory.FromAsync(session.BeginLockConference,
                                   session.EndLockConference, options, null));
 }
 public static Task LockConferenceAsync(this ConferenceSession session,
     LockConferenceOptions options)
 {
     return Task.Factory.FromAsync(session.BeginLockConference,
         session.EndLockConference, options, null);
 }