public static Task ModifyConferenceConfigurationAsync(this ConferenceSession session,
                                                       ConferenceAccessLevel accessLevel, LobbyBypass lobbyBypass,
                                                       AutomaticLeaderAssignment automaticLeaderAssignment)
 {
     return(Task.Factory.FromAsync(session.BeginModifyConferenceConfiguration,
                                   session.EndModifyConferenceConfiguration, accessLevel, lobbyBypass,
                                   automaticLeaderAssignment, null));
 }
 public static Task ModifyConferenceConfigurationAsync(this ConferenceSession session,
     ConferenceAccessLevel accessLevel, LobbyBypass lobbyBypass, 
     AutomaticLeaderAssignment automaticLeaderAssignment)
 {
     return Task.Factory.FromAsync(session.BeginModifyConferenceConfiguration,
         session.EndModifyConferenceConfiguration, accessLevel, lobbyBypass, 
         automaticLeaderAssignment, null);
 }