OpenCardAsyncFunc - делегат

Public Delegate Function OpenCardAsyncFunc ( 
	Optional cardID As Guid? = Nothing,
	Optional cardTypeID As Guid? = Nothing,
	Optional cardTypeName As String = Nothing,
	Optional options As OpenCardOptions = Nothing,
	Optional cancellationToken As CancellationToken = Nothing
) As Task(Of ICardUIContextObject)

public delegate Task<ICardUIContextObject^>^ OpenCardAsyncFunc(
	Nullable<Guid> cardID = nullptr, 
	Nullable<Guid> cardTypeID = nullptr, 
	String^ cardTypeName = nullptr, 
	OpenCardOptions^ options = nullptr, 
	CancellationToken cancellationToken = CancellationToken()
)

type OpenCardAsyncFunc = 
    delegate of 
        ?cardID : Nullable<Guid> * 
        ?cardTypeID : Nullable<Guid> * 
        ?cardTypeName : string * 
        ?options : OpenCardOptions * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _cardID = defaultArg cardID null
        let _cardTypeID = defaultArg cardTypeID null
        let _cardTypeName = defaultArg cardTypeName null
        let _options = defaultArg options null
        let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> Task<ICardUIContextObject>