Slice沒有效果

seal

var filter = Builders<BsonDocument>.Filter.Eq("_id", new ObjectId(id));

var projecting = Builders<BsonDocument>.Projection.Slice("comments", 0, 5).Include("_id").Include("comments");

List<BsonDocument> findResult = _collection.Aggregate().Match(filter).Project(projecting).ToList();

用以上語法取到結果，comments還是所有的數據，並沒有篩成5筆

跪求各位大神賜教

22265

試看看

.Project(BsonDocument.Parse("{ x: {$slice: ['$comments', 2,3]} } "))