Наследование: IEntity, ICreatable
 public void SaveToDatabase(long eventRssChannelCreated)
 {
     var rssChannelCreated = new EventRssChannelCreated { RssChannelId = eventRssChannelCreated };
     this.database.EventRssChannelCreated.Add(rssChannelCreated);
     this.database.SaveChanges();
 }