private void ButtonCalculate_Click(object sender, RoutedEventArgs e) { Mileage m = new Mileage(); //inputs m.Distance = double.Parse(textMiles.Text); m.Gallons = double.Parse(textGallons.Text); m.PricePerGallon = double.Parse(textPrice.Text); //outputs labelMileage.Content = m.CalculateMileage().ToString(); labelCost.Content = m.CalculatePricePerMile().ToString(); }