public ProductCostHistoryCollection GetAllProductCostHistorysDynamicCollection(string whereExpression, string orderBy)
        {
            IDBManager dbm = new DBManager();
            ProductCostHistoryCollection cols = new ProductCostHistoryCollection();

            try
            {
                dbm.CreateParameters(2);
                dbm.AddParameters(0, "@WhereCondition", whereExpression);
                dbm.AddParameters(1, "@OrderByExpression", orderBy);
                IDataReader reader = dbm.ExecuteReader(CommandType.StoredProcedure, "SelectProductInventoriesDynamic");
                while (reader.Read())
                {
                    ProductCostHistory productCostHistory = new ProductCostHistory();
                    productCostHistory.ProductID    = Int32.Parse(reader["ProductID"].ToString());
                    productCostHistory.StartDate    = DateTime.Parse(reader["StartDate"].ToString());
                    productCostHistory.EndDate      = DateTime.Parse(reader["EndDate"].ToString());
                    productCostHistory.StandardCost = Decimal.Parse(reader["StandardCost"].ToString());
                    productCostHistory.ModifiedDate = DateTime.Parse(reader["ModifiedDate"].ToString());
                    cols.Add(productCostHistory);
                }
            }

            catch (Exception ex)
            {
                log.Write(ex.Message, "GetAllProductCostHistorysDynamicCollection");
                throw (ex);
            }
            finally
            {
                dbm.Dispose();
            }
            return(cols);
        }
        public ProductCostHistoryCollection GetAllProductCostHistorysCollection()
        {
            IDBManager dbm = new DBManager();
            ProductCostHistoryCollection cols = new ProductCostHistoryCollection();

            try
            {
                IDataReader reader = dbm.ExecuteReader(CommandType.StoredProcedure, "SelectProductCostHistoriesAll");
                while (reader.Read())
                {
                    ProductCostHistory productCostHistory = new ProductCostHistory();
                    productCostHistory.ID           = Int32.Parse(reader["ID"].ToString());
                    productCostHistory.ProductID    = Int32.Parse(reader["ProductID"].ToString());
                    productCostHistory.StartDate    = DateTime.Parse(reader["StartDate"].ToString());
                    productCostHistory.EndDate      = DateTime.Parse(reader["EndDate"].ToString());
                    productCostHistory.StandardCost = Decimal.Parse(reader["StandardCost"].ToString());
                    productCostHistory.ModifiedDate = DateTime.Parse(reader["ModifiedDate"].ToString());
                    cols.Add(productCostHistory);
                }
            }

            catch (Exception ex)
            {
                log.Write(ex.Message, "GetAllProductCostHistorysCollection");
                throw (ex);
            }
            finally
            {
                dbm.Dispose();
            }
            return(cols);
        }