public Form1() { InitializeComponent(); dinnerParty = new DinnerParty(checkBoxDinnerHealthy.Checked, checkBoxDinnerFancy.Checked, (int)numericUpDownDinner.Value); birthdayParty = new BirthdayParty(textBoxCakeWriting.Text, checkBoxBirthdayFancy.Checked, (int)numericUpDownBirthday.Value); DisplayDinnerPartyCost(); DisplayBirthdayPartyCost(); }