CardExtensionsCopyAndAddRangeAsyncT - метод

<ExtensionAttribute>
Public Shared Function CopyAndAddRangeAsync(Of T As {New, CardSerializableObject}) ( 
	sourceItems As IEnumerable(Of T),
	targetItems As ICollection(Of T),
	Optional startFromIndex As Integer = 0,
	Optional count As Integer? = Nothing,
	Optional cancellationToken As CancellationToken = Nothing
) As ValueTask

public:
[ExtensionAttribute]
generic<typename T>
where T : gcnew(), CardSerializableObject
static ValueTask CopyAndAddRangeAsync(
	IEnumerable<T>^ sourceItems, 
	ICollection<T>^ targetItems, 
	int startFromIndex = 0, 
	Nullable<int> count = nullptr, 
	CancellationToken cancellationToken = CancellationToken()
)

[<ExtensionAttribute>]
static member CopyAndAddRangeAsync : 
        sourceItems : IEnumerable<'T> * 
        targetItems : ICollection<'T> * 
        ?startFromIndex : int * 
        ?count : Nullable<int> * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _startFromIndex = defaultArg startFromIndex 0
        let _count = defaultArg count null
        let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> ValueTask  when 'T : new() and CardSerializableObject