IForumProviderAddParticipantsAsync - метод

Function AddParticipantsAsync ( 
	topicID As Guid,
	participants As IReadOnlyCollection(Of Guid),
	isReadOnly As Boolean,
	canEditMessages As Boolean,
	Optional type As ParticipantType = ParticipantType.Participant,
	Optional isSubscribed As Boolean = false,
	Optional serviceMessageMode As ForumServiceMessageMode = ForumServiceMessageMode.Enabled,
	Optional cancellationToken As CancellationToken = Nothing
) As Task(Of ( As ForumResponse,  As ValidationResult))

Task<ValueTuple<ForumResponse^, ValidationResult^>>^ AddParticipantsAsync(
	Guid topicID, 
	IReadOnlyCollection<Guid>^ participants, 
	bool isReadOnly, 
	bool canEditMessages, 
	ParticipantType type = ParticipantType::Participant, 
	bool isSubscribed = false, 
	ForumServiceMessageMode serviceMessageMode = ForumServiceMessageMode::Enabled, 
	CancellationToken cancellationToken = CancellationToken()
)

abstract AddParticipantsAsync : 
        topicID : Guid * 
        participants : IReadOnlyCollection<Guid> * 
        isReadOnly : bool * 
        canEditMessages : bool * 
        ?type : ParticipantType * 
        ?isSubscribed : bool * 
        ?serviceMessageMode : ForumServiceMessageMode * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _type = defaultArg type ParticipantType.Participant
        let _isSubscribed = defaultArg isSubscribed false
        let _serviceMessageMode = defaultArg serviceMessageMode ForumServiceMessageMode.Enabled
        let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> Task<ValueTuple<ForumResponse, ValidationResult>>