public CountryCurrenciesResponse Post(CountryCurrencies request)
        {
            if (request.CountryCurrency.Id > 0)
              {
            Bm2s.Data.Common.BLL.Parameter.CountryCurrency item = Datas.Instance.DataStorage.CountryCurrencies[request.CountryCurrency.Id];
            item.CountryId = request.CountryCurrency.Country.Id;
            item.EndingDate = request.CountryCurrency.EndingDate;
            item.StartingDate = request.CountryCurrency.StartingDate;
            item.UnitId = request.CountryCurrency.Unit.Id;
            Datas.Instance.DataStorage.CountryCurrencies[request.CountryCurrency.Id] = item;
              }
              else
              {
            Bm2s.Data.Common.BLL.Parameter.CountryCurrency item = new Data.Common.BLL.Parameter.CountryCurrency()
            {
              CountryId = request.CountryCurrency.Country.Id,
              EndingDate = request.CountryCurrency.EndingDate,
              StartingDate = request.CountryCurrency.StartingDate,
              UnitId = request.CountryCurrency.Unit.Id
            };

            Datas.Instance.DataStorage.CountryCurrencies.Add(item);
            request.CountryCurrency.Id = item.Id;
              }

              CountryCurrenciesResponse response = new CountryCurrenciesResponse();
              response.CountryCurrencies.Add(request.CountryCurrency);
              return response;
        }
        public CountryCurrenciesResponse Delete(CountryCurrencies request)
        {
            Bm2s.Data.Common.BLL.Parameter.CountryCurrency item = Datas.Instance.DataStorage.CountryCurrencies[request.CountryCurrency.Id];
              item.EndingDate = DateTime.Now;
              Datas.Instance.DataStorage.CountryCurrencies[item.Id] = item;

              CountryCurrenciesResponse response = new CountryCurrenciesResponse();
              response.CountryCurrencies.Add(request.CountryCurrency);
              return response;
        }
        public CountryCurrenciesResponse Get(CountryCurrencies request)
        {
            CountryCurrenciesResponse response = new CountryCurrenciesResponse();
              List<Bm2s.Data.Common.BLL.Parameter.CountryCurrency> items = new List<Data.Common.BLL.Parameter.CountryCurrency>();
              if (!request.Ids.Any())
              {
            items.AddRange(Datas.Instance.DataStorage.CountryCurrencies.Where(item =>
              (request.CountryId == 0 || item.CountryId == request.CountryId) &&
              (request.UnitId == 0 || item.UnitId == request.UnitId) &&
              (!request.Date.HasValue || (request.Date >= item.StartingDate && (!item.EndingDate.HasValue || request.Date < item.EndingDate.Value)))
              ));
              }
              else
              {
            items.AddRange(Datas.Instance.DataStorage.CountryCurrencies.Where(item => request.Ids.Contains(item.Id)));
              }

              var collection = (from item in items
                        select new Bm2s.Poco.Common.Parameter.CountryCurrency()
                        {
                          Country = new CountriesService().Get(new Countries() { Ids = new List<int>() { item.CountryId } }).Countries.FirstOrDefault(),
                          EndingDate = item.EndingDate,
                          Id = item.Id,
                          StartingDate = item.StartingDate,
                          Unit = new UnitsService().Get(new Units() { Ids = new List<int>() { item.UnitId } }).Units.FirstOrDefault()
                        }).AsQueryable().OrderBy(request.Order, !request.DescendingOrder);

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

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

              return response;
        }