MongoDB使用C#驱动程序替换数组内的数组

var client = new MongoClient("mongodb://localhost:27017");
var database = client.GetDatabase("mydb");

var collection = database.GetCollection<BsonDocument>("mycollection");
var filter = Builders<BsonDocument>.Filter.Eq("_id", ObjectId.Parse("documentId"));
var document = collection.Find(filter).FirstOrDefault();

var array = document["arrayField"].AsBsonArray;
var newArray = new BsonArray();
foreach (var element in array)
{
    if (element is BsonArray)
    {
        // 替换数组内的数组
        var newElement = new BsonArray();
        newElement.Add("replacement1");
        newElement.Add("replacement2");
        newArray.Add(newElement);
    }
    else
    {
        newArray.Add(element);
    }
}
document["arrayField"] = newArray;

collection.ReplaceOne(filter, document);