//4b1 InsertOne 1 row document
public string DocumentInsert_InsertOne(string name = "honda v1")
{
    // Replace the uri string with your MongoDB deployment's connection string.
    var client = new MongoClient(
        "mongodb://localhost:27017/?readPreference=primary&appname=MongoDB%20Compass&directConnection=true&ssl=false"
    );

    string re = "";

    //lấy database
    var database = client.GetDatabase("HvDadabase");
    //Lấy List Collection
    var collection = database.GetCollection<BsonDocument>("HvCars");

    //select lấy 1 row Document
    //var document = new BsonDocument
    //{
    //    { "student_id", 10000 },
    //    { "scores", new BsonArray
    //        {
    //        new BsonDocument{ {"type", "exam"}, {"score", 88.12334193287023 } },
    //        new BsonDocument{ {"type", "quiz"}, {"score", 74.92381029342834 } },
    //        new BsonDocument{ {"type", "homework"}, {"score", 89.97929384290324 } },                    
    //        }
    //    },
    //    { "class_id", 480}
    //};
    var document = new BsonDocument
    {
        { "name", "Toyota v1" },
        { "year", 2001}
    };

    collection.InsertOne(document);
    //await collection.InsertOneAsync(document);

    re = "InsertOne complete";
    return re;
}