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(); if (loadCheckBox.Checked) { loadWeight.kilograms = Convert.ToDecimal(loadWeightTextBox.Text); } Volume maxFuel = new Volume(); maxFuel.litres = Convert.ToDecimal(maxFuelTextBox.Text); LorryServices lorryServiceObj = new LorryServices(); lorryServiceObj.Add( vehicleNameTextBox.Text, numberPlateTextBox.Text, milage, weight, loadCheckBox.Checked, loadWeight, maxFuel, Convert.ToInt32(maxPassengersTextBox.Text) ); (Owner as LorryFormView).FillLorryList(); Close(); }