public string[] InsertBulk(IEnumerable <BsonDocument> docs) { if (!Opened) { return new string[] { } } ; // create indexes before //_engine.EnsureIndex(_LITEDB_CONST.COLLECTION_NAME, _LITEDB_CONST.FIELD_DATE_CREATE); // bulk data insert string[] rs = _engine.InsertReturnIDs(_LITEDB_CONST.COLLECTION_NAME, docs); return(rs); }