public static int AddCurrencyRate(tCurrencyRate currencyRate)
 {
     try
     {
         return AccountingDataProvider.AddCurrencyRate(currencyRate);
     }
     catch (Exception exception)
     {
         throw new Exception(exception.Message);
     }
 }
        public static int AddCurrencyRate(tCurrencyRate currencyRate)
        {
            int rowsAdded;

            using (IDbConnection connection = DbConnectionHelper.GetConnection())
            {
                var query =
                    new StringBuilder(
                        "INSERT INTO tCurrencyRate(Currency, Rate, RateDate)");
                query.Append("VALUES(@Currency, @Rate,@RateDate)");

                rowsAdded = connection.Execute(query.ToString(), currencyRate);

            }

            return rowsAdded;
        }
        public static int UpdateCurrencyRate(tCurrencyRate currencyRate)
        {
            int rowsAdded;

            using (IDbConnection connection = DbConnectionHelper.GetConnection())
            {
                var query =
                    new StringBuilder(
                        "UPDATE tCurrencyRate SET Currency = @Currency, ");
                query.Append("Rate = @Rate, RateDate = @RateDate WHERE Id = @Id");

                rowsAdded = connection.Execute(query.ToString(), currencyRate);
            }

            return rowsAdded;
        }
        public static int DeleteCurrencyRate(tCurrencyRate currencyRate)
        {
            int rowsAdded;

            using (IDbConnection connection = DbConnectionHelper.GetConnection())
            {
                var query =
                    new StringBuilder("DELETE FROM tCurrencyRate WHERE Id = @Id");

                rowsAdded = connection.Execute(query.ToString(), currencyRate);
            }

            return rowsAdded;
        }