如何在使用mongo csharp插入后获取rcently插入文档的_id？

using MongoDB.Driver;
using MongoDB.Bson;

var client = new MongoClient("mongodb://localhost:27017");
var database = client.GetDatabase("your_database_name");
var collection = database.GetCollection<BsonDocument>("your_collection_name");

var document = new BsonDocument
{
    { "name", "John" },
    { "age", 30 },
    { "city", "New York" }
};

collection.InsertOne(document);

var filter = Builders<BsonDocument>.Filter.Empty;
var sort = Builders<BsonDocument>.Sort.Descending("_id");
var projection = Builders<BsonDocument>.Projection.Include("_id").Exclude("_id");

var recentlyInsertedDocument = collection.Find(filter)
    .Sort(sort)
    .Project(projection)
    .FirstOrDefault();

var recentlyInsertedId = recentlyInsertedDocument["_id"].ToString();