Simple C# class to connect to and write messages to MongoDB

MongoLogger

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using MongoDB.Bson;
using MongoDB.Bson.IO;
using MongoDB.Driver;
using MongoDB.Driver.Builders;

namespace Tester
{
    class MongoLogger : Logger
    {
        MongoServer server;
        MongoDatabase db;
        MongoCollection coll;

        public MongoLogger(String db_name, String collection_name)
        {
            server = MongoServer.Create();  //leave out connectionString if connecting to localhost mongo server
            db = server.GetDatabase(db_name);
            coll = db.GetCollection<BsonDocument>(collection_name);
        }

        public MongoLogger(String db_name, String collection_name, String connectionString)
        {
            server = MongoServer.Create(connectionString);
            db = server.GetDatabase(db_name);
            coll = db.GetCollection<BsonDocument>(collection_name);
        }

        public void EnsureIndex(String index_key)
        {
            coll.EnsureIndex(new String[] { index_key });
        }

        public void EnsureIndex(String[] index_keys)
        {
            coll.EnsureIndex(index_keys);
        }

        public void addLogMessage(BsonDocument message)
        {
            coll.Insert<BsonDocument>(message);
        }

        public void addLogMessage(List<BsonDocument> message_batch)
        {
            coll.InsertBatch<BsonDocument>(message_batch);
        }
    }
}