DeleteResult DeleteOne(
	FilterDefinition<TDocument> filter,
	CancellationToken cancellationToken = null
)

Function DeleteOne ( 
	filter As FilterDefinition(Of TDocument),
	Optional cancellationToken As CancellationToken = Nothing
) As DeleteResult

abstract DeleteOne : 
        filter : FilterDefinition<'TDocument> * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _cancellationToken = defaultArg cancellationToken null
*)
-> DeleteResult