Inheritance: IEntity, ICreatable, IModifiable
 private void SaveFeatureRequestToDatabase(FeatureRequest featureRequest)
 {
     this.database.FeatureRequests.Add(featureRequest);
     this.database.SaveChanges();
 }
 public void AddVoteUpRequestByUserForArticle(long userId, StreamType modelStreamType, long id)
 {
     var featureRequest = new FeatureRequest(userId, id, modelStreamType, FeatureRequestType.Voteup);
     this.SaveFeatureRequestToDatabase(featureRequest);
 }