/// <summary>
        /// Gets a collection of all available pricelists
        /// </summary>
        /// <returns>Collection of pricelists</returns>
        public override DBPricelistCollection GetAllPricelists()
        {
            DBPricelistCollection pricelistCollection = new DBPricelistCollection();

            Database db = NopSqlDataHelper.CreateConnection(_sqlConnectionString);
            DbCommand dbCommand = db.GetStoredProcCommand("Nop_PricelistLoadAll");

            using (IDataReader dataReader = db.ExecuteReader(dbCommand))
            {
                while (dataReader.Read())
                {
                    DBPricelist newPricelist = GetPricelistFromReader(dataReader);
                    pricelistCollection.Add(newPricelist);
                }
            }

            return pricelistCollection;
        }