FileHelperCopyAsync(String, String, CancellationToken) - метод

public static Task CopyAsync(
	string sourceFile,
	string destinationFile,
	CancellationToken cancellationToken = default
)

Public Shared Function CopyAsync ( 
	sourceFile As String,
	destinationFile As String,
	Optional cancellationToken As CancellationToken = Nothing
) As Task

public:
static Task^ CopyAsync(
	String^ sourceFile, 
	String^ destinationFile, 
	CancellationToken cancellationToken = CancellationToken()
)

static member CopyAsync : 
        sourceFile : string * 
        destinationFile : string * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> Task