FileExtensionsCopyAsync - метод

public static ValueTask<(IFile copiedFile, ValidationResult result)> CopyAsync(
	this IFile file,
	CancellationToken cancellationToken = default
)

<ExtensionAttribute>
Public Shared Function CopyAsync ( 
	file As IFile,
	Optional cancellationToken As CancellationToken = Nothing
) As ValueTask(Of (copiedFile As IFile, result As ValidationResult))

public:
[ExtensionAttribute]
static ValueTask<ValueTuple<IFile^, ValidationResult^>> CopyAsync(
	IFile^ file, 
	CancellationToken cancellationToken = CancellationToken()
)

[<ExtensionAttribute>]
static member CopyAsync : 
        file : IFile * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> ValueTask<ValueTuple<IFile, ValidationResult>>