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                        protected override Detail GetDetailPage(
            aggregate aggregate, 
            int cashbackRate,
            BannerResponse bannerInfo,
            List<MediaShortResponse> mediaInfo,
            EntityFavourites likeCountInfo, 
            List<FavouriteEntity> likeInfo)
        {
            var announcementDetail = new Detail
            (
                aggregate.Details.Id,
                aggregate.Details.Alias,
                aggregate.Details.Title,
                aggregate.Details.Description,
                aggregate.Details.DescriptionShortcut,
                aggregate.Details.Age,
                aggregate.ExtendedDetails.DataSourceId,
                aggregate.ExtendedDetails.DataSourceItemId,
                cashbackRate,
                null,
                aggregate.ExtendedDetails.LastEventDateTime,
                aggregate.ExtendedDetails.EventClosestDateTime,
                aggregate.ExtendedDetails.Url,
                aggregate.ExtendedDetails.Category != null
                    ? new AnnouncementCategory(aggregate.ExtendedDetails.Category.Id, 
                        aggregate.ExtendedDetails.Category.Title,
                        aggregate.ExtendedDetails.Category.Url)
                    : null,
                aggregate.ExtendedDetails.Tags?.Select(ss =>
                    new Tag(ss.Title, HttpUtility.UrlPathEncode(ss.Url))
                ).ToList(),
                aggregate.Details.Privileges?.Select(ss => new Privilege()
                {
                    Description = ss.Description,
                    Id = ss.Id,
                    ImageUrl = ss.ImageUrl.ToString(),
                    Title = ss.Title
                }).ToList(),
                mediaInfo.Select(m => new Media
                {
                    Type = m.Type,
                    Url = m.Url
                }).ToList(),
                aggregate.ExtendedDetails.EventMinPrice,
                likeInfo.FirstOrDefault(x => x.EntityId == aggregate.Details.Id)?.IsSet ?? false,
                likeCountInfo?.TotalCount,
                aggregate.ExtendedDetails.Promotext,
                bannerInfo != null ? new Banner { Url = bannerInfo.Url, ImageUrl = bannerInfo.ImageUrl } : null,
                aggregate.Details.Venue != null
                    ? new ShortVenue(aggregate.Details.Venue.Id,
                        aggregate.Details.Venue.Title,
                        aggregate.Details.Venue.Url.Replace(_liveBaseAddress, ""),
                        aggregate.Details.Venue.Address)
                    : null,
                (AnnouncementStatus)aggregate.Details.Status,
                aggregate.ExtendedDetails.PremiumRule,
                aggregate.Details.HasPrivilegeEnabled,
            );
            return announcementDetail;
 }
                                 
        
Может быть https://refactoring.guru/design-patterns/builder ?