public static Task<DeleteResult> DeleteOneAsync<TDocument>(
	this IMongoCollection<TDocument> collection,
	Expression<Func<TDocument, bool>> filter,
	CancellationToken cancellationToken = null
)

<ExtensionAttribute>
Public Shared Function DeleteOneAsync(Of TDocument) ( 
	collection As IMongoCollection(Of TDocument),
	filter As Expression(Of Func(Of TDocument, Boolean)),
	Optional cancellationToken As CancellationToken = Nothing
) As Task(Of DeleteResult)

[<ExtensionAttribute>]
static member DeleteOneAsync : 
        collection : IMongoCollection<'TDocument> * 
        filter : Expression<Func<'TDocument, bool>> * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _cancellationToken = defaultArg cancellationToken null
*)
-> Task<DeleteResult>