Create a form with these controls.

3 text boxes

3 labels

1 button

---

Two of the text boxes will be used to get two numbers.

The third text box displays the result, it should be read only.

Use the labels to describe the text boxes.

The button would say 'Add'.

---

Button Click - When the button is clicked, get the numbers from the first two text boxes, add them together and put the result into the 3rd text box. If there is a problem, put 'Error' in the 3rd text box.

c#