C# 与 MongoDB 的 CURD

        static void Main(string[] args)        {            //建立连接            var client = new MongoClient();            //建立数据库            var database = client.GetDatabase("TestDb");            //建立collection            var collection = database.GetCollection<BsonDocument>("foo");            var document = new BsonDocument            {                {"name","MongoDB"},                {"type","Database"},                {"count",1},                {"info",new BsonDocument{{"x",203},{"y",102}}}            };            //插入数据            collection.InsertOne(document);            var count = collection.Count(document);            Console.WriteLine(count);            //查询数据            var document1 = collection.Find(document);            Console.WriteLine(document1.ToString());            //更新数据            var filter = Builders<BsonDocument>.Filter.Eq("name", "MongoDB");            var update = Builders<BsonDocument>.Update.Set("name", "Ghazi");            collection.UpdateMany(filter, update);            //删除数据            var filter1 = Builders<BsonDocument>.Filter.Eq("count", 101);            collection.DeleteMany(filter1);            BsonDocument document2 = new BsonDocument();            document2.Add("name", "MongoDB");            document2.Add("type", "Database");            document2.Add("count", "1");            collection.InsertOne(document2);            Console.Read();        }