private void submitButton_Click(object sender, System.EventArgs e)
        {
            FuelEconomy milage = new FuelEconomy();

            milage.milesPerGallon = Convert.ToDecimal(milageTextBox.Text);
            Weight weight = new Weight();

            weight.kilograms = Convert.ToDecimal(weightTextBox.Text);
            Weight loadWeight = new Weight();
            Volume maxFuel    = new Volume();

            maxFuel.litres = Convert.ToDecimal(maxFuelTextBox.Text);

            MotorbikeServices motorbikeServiceObj = new MotorbikeServices();

            motorbikeServiceObj.Add(
                vehicleNameTextBox.Text,
                numberPlateTextBox.Text,
                milage,
                weight,
                maxFuel,
                Convert.ToInt32(maxPassengersTextBox.Text),
                sideCarCheckBox.Checked
                );

            (Owner as MotorbikeFormView).FillMotorbikeList();
            Close();
        }