Changing Labels

[QuestionPlease]

For each order, the user selects a main course item and the application displays the associated add-on items. Then, the user can select zero or more of these add-ons.


My Question is how do I get the check boxes text to change if you will when the user selects like pizza, instead of having it show lattuce and such for hamburgers I want it to show toppings. These are the add-on's that should be displayed for humburger, pizza or salad.
Add-ons
• For a hamburger, the three add-on items are: (1) Lettuce, tomato, and onions; (2) Mayonnaise and mustard; and (3) French fries. The price of each is 75 cents.
• For a pizza, the three add-on items are: (1) Pepperoni, (2) Sausage, and (3) Olives. The price of each is 50 cents.
• For a salad, the three items are (1) Croutons, (2) Bacon bits, and (3) Bread sticks. The price of each is 25 cents

my code isn't showing anything on the form

 private void hamburger_CheckChanged(object sender, System.EventArgs e)
        {
            if (radioHamburger.Checked == true)
                ResetChecked();

            groupBox2.Text = " Add-on Items ($ .75/each)";
            checkBox1.Text = "Lettuce, tomato, and onions";
            checkBox2.Text = "Mayonnaise and mustard";
            checkBox3.Text = "French fries";
        }

        private void pizza_CheckChanged(object sender, System.EventArgs e)
        {
            if (radioPizza.Checked == true)
                ResetChecked();
            groupBox2.Text = "Add-on Items ($ .50/each)";
            checkBox1.Text = "Pepperoni";
            checkBox2.Text = "Sausage";
            checkBox3.Text = "Olives";

        }

        private void salad_CheckChanged(object sender, System.EventArgs e)
        {
            if (radioSalad.Checked == true)
                ResetChecked();
            groupBox2.Text = "Add-on Items ($ .25/each)";
            checkBox1.Text = "Croutons";
            checkBox2.Text = "Bacon bits";
            checkBox3.Text = "Bread sticks";


        }