public void AddScoreElection(string id, [FromBody] DataScore addScore) { var getArea = AreaCollection.Find(it => it.Id == id).FirstOrDefault(); addScore.DateElection = DateTime.Now; getArea.ScoreReceive.Add(new DataScore { DateElection = addScore.DateElection, Score = addScore.Score }); AreaCollection.ReplaceOne(it => it.Id == id, getArea); }