public static Task<IAsyncCursor<TDocument>> FindAsync<TDocument>(
	this IMongoCollection<TDocument> collection,
	Expression<Func<TDocument, bool>> filter,
	FindOptions<TDocument, TDocument> options = null,
	CancellationToken cancellationToken = null
)

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

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