[ObsoleteAttribute("All new GridFS files should use an ObjectId as the Id.")]
public Task<GridFSDownloadStream> OpenDownloadStreamAsync(
	BsonValue id,
	GridFSDownloadOptions options = null,
	CancellationToken cancellationToken = null
)

<ObsoleteAttribute("All new GridFS files should use an ObjectId as the Id.")>
Public Function OpenDownloadStreamAsync ( 
	id As BsonValue,
	Optional options As GridFSDownloadOptions = Nothing,
	Optional cancellationToken As CancellationToken = Nothing
) As Task(Of GridFSDownloadStream)

[<ObsoleteAttribute("All new GridFS files should use an ObjectId as the Id.")>]
member OpenDownloadStreamAsync : 
        id : BsonValue * 
        ?options : GridFSDownloadOptions * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _options = defaultArg options null
        let _cancellationToken = defaultArg cancellationToken null
*)
-> Task<GridFSDownloadStream>