How to display Check Box Text

[QuestionPlease]

My Question is how do I get the check boxes text to display the addons for meals below
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";


        }

this is how the check box's should display the addons(text) so if the user clicks another radio botton the check box text changes to the addons for that meal.

and this is what mine is displaying no text?