IForumProviderUpdateRolesAsync - метод

Function UpdateRolesAsync ( 
	topicID As Guid,
	roles As IReadOnlyCollection(Of Guid),
	Optional isReadOnly As Boolean? = Nothing,
	Optional canEditMessages As Boolean? = Nothing,
	Optional isSubscribed As Boolean? = Nothing,
	Optional cancellationToken As CancellationToken = Nothing
) As Task(Of ValidationResult)

Task<ValidationResult^>^ UpdateRolesAsync(
	Guid topicID, 
	IReadOnlyCollection<Guid>^ roles, 
	Nullable<bool> isReadOnly = nullptr, 
	Nullable<bool> canEditMessages = nullptr, 
	Nullable<bool> isSubscribed = nullptr, 
	CancellationToken cancellationToken = CancellationToken()
)

abstract UpdateRolesAsync : 
        topicID : Guid * 
        roles : IReadOnlyCollection<Guid> * 
        ?isReadOnly : Nullable<bool> * 
        ?canEditMessages : Nullable<bool> * 
        ?isSubscribed : Nullable<bool> * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _isReadOnly = defaultArg isReadOnly null
        let _canEditMessages = defaultArg canEditMessages null
        let _isSubscribed = defaultArg isSubscribed null
        let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> Task<ValidationResult>