如何在C#的MongoDB驱动中获取数组中某一字段的值

using MongoDB.Driver;

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

{
  "_id": ObjectId("60a7e8e8e8e8e8e8e8e8e8e8"),
  "name": "John",
  "scores": [80, 90, 85, 95]
}

var filter = Builders<BsonDocument>.Filter.Eq("name", "John");
var projection = Builders<BsonDocument>.Projection.Include("scores");
var document = collection.Find(filter).Project(projection).FirstOrDefault();

var scores = document["scores"].AsBsonArray;
var firstScore = scores[0].AsInt32;