如何使用C＃驱动程序更新mongodb中的文档

Question

如何使用c＃driver（2.4.4）

在mongodb中整体更新文档

protected static IMongoClient _client;
            protected static IMongoDatabase _database;
            protected static IMongoCollection<UserSetting> _collection;

            public DataAccess()
            {
                _client = new MongoClient("mongodb://localhost:27017");
                _database = _client.GetDatabase("usersettings");
                _collection = _database.GetCollection<UserSetting>("settings");
            }

             public void SaveSetting(int Id, UserSetting setting)
            {
                setting.UserID = Id;
                var settingsForID = _database.GetCollection<UserSetting>("settings").AsQueryable<UserSetting>().Where(c => c.UserID == Id);

            }