public ArticlePartnerVatsResponse Post(ArticlePartnerVats request)
        {
            if (request.ArticlePartnerVat.Id > 0)
              {
            Bm2s.Data.Common.BLL.Parameter.ArticlePartnerVat item = Datas.Instance.DataStorage.ArticlePartnerVats[request.ArticlePartnerVat.Id];
            item.AccountingEntry = request.ArticlePartnerVat.AccountingEntry;
            item.ArticleId = request.ArticlePartnerVat.Article.Id;
            item.Multiplier = Convert.ToDouble(request.ArticlePartnerVat.Multiplier);
            item.PartnerId = request.ArticlePartnerVat.Partner.Id;
            item.Rate = Convert.ToDouble(request.ArticlePartnerVat.Rate);
            item.VatId = request.ArticlePartnerVat.Vat.Id;
            Datas.Instance.DataStorage.ArticlePartnerVats[request.ArticlePartnerVat.Id] = item;
              }
              else
              {
            Bm2s.Data.Common.BLL.Parameter.ArticlePartnerVat item = new Data.Common.BLL.Parameter.ArticlePartnerVat()
            {
              AccountingEntry = request.ArticlePartnerVat.AccountingEntry,
              ArticleId = request.ArticlePartnerVat.Article.Id,
              Multiplier = Convert.ToDouble(request.ArticlePartnerVat.Multiplier),
              PartnerId = request.ArticlePartnerVat.Partner.Id,
              Rate = Convert.ToDouble(request.ArticlePartnerVat.Rate),
              VatId = request.ArticlePartnerVat.Vat.Id
            };

            Datas.Instance.DataStorage.ArticlePartnerVats.Add(item);
            request.ArticlePartnerVat.Id = item.Id;
              }

              ArticlePartnerVatsResponse response = new ArticlePartnerVatsResponse();
              response.ArticlePartnerVats.Add(request.ArticlePartnerVat);
              return response;
        }
        public ArticlePartnerVatsResponse Delete(ArticlePartnerVats request)
        {
            Bm2s.Data.Common.BLL.Parameter.ArticlePartnerVat item = Datas.Instance.DataStorage.ArticlePartnerVats[request.ArticlePartnerVat.Id];
              Datas.Instance.DataStorage.ArticlePartnerVats.Remove(item);

              ArticlePartnerVatsResponse response = new ArticlePartnerVatsResponse();
              response.ArticlePartnerVats.Add(request.ArticlePartnerVat);
              return response;
        }
        public ArticlePartnerVatsResponse Get(ArticlePartnerVats request)
        {
            ArticlePartnerVatsResponse response = new ArticlePartnerVatsResponse();
              List<Bm2s.Data.Common.BLL.Parameter.ArticlePartnerVat> items = new List<Data.Common.BLL.Parameter.ArticlePartnerVat>();
              if (!request.Ids.Any())
              {
            items.AddRange(Datas.Instance.DataStorage.ArticlePartnerVats.Where(item =>
              (request.ArticleId == 0 || item.ArticleId == request.ArticleId) &&
              (request.PartnerId == 0 || item.PartnerId == request.PartnerId) &&
              (request.VatId == 0 || item.VatId == request.VatId)
              ));
              }
              else
              {
            items.AddRange(Datas.Instance.DataStorage.ArticlePartnerVats.Where(item => request.Ids.Contains(item.Id)));
              }

              var collection = (from item in items
                        select new Bm2s.Poco.Common.Parameter.ArticlePartnerVat()
                        {
                          AccountingEntry = item.AccountingEntry,
                          Article = new ArticlesService().Get(new Articles() { Ids = new List<int>() { item.ArticleId } }).Articles.FirstOrDefault(),
                          Id = item.Id,
                          Multiplier = Convert.ToDecimal(item.Multiplier),
                          Partner = new PartnersService().Get(new Partners() { Ids = new List<int>() { item.PartnerId } }).Partners.FirstOrDefault(),
                          Rate = Convert.ToDecimal(item.Rate),
                          Vat = new VatsService().Get(new Vats() { Ids = new List<int>() { item.VatId } }).Vats.FirstOrDefault()
                        }).AsQueryable().OrderBy(request.Order, !request.DescendingOrder);

              response.ItemsCount = collection.Count();
              if (request.PageSize > 0)
              {
            response.ArticlePartnerVats.AddRange(collection.Skip((request.CurrentPage - 1) * request.PageSize).Take(request.PageSize));
              }
              else
              {
            response.ArticlePartnerVats.AddRange(collection);
              }

              try
              {
            response.PagesCount = collection.Count() / response.ArticlePartnerVats.Count + (collection.Count() % response.ArticlePartnerVats.Count > 0 ? 1 : 0);
              }
              catch
              {
            response.PagesCount = 1;
              }

              return response;
        }