Hello, im new here!

anyway..im trying to make an Calculator in window forms. so the problem is, i have 2 text box's
like num1 = textbox
and num2 = textbox
then i have button called "Go"
in the text box's im enter 2 numbers and its not reading it...
i mean, i set 2 variables int num1 = 0;
and int num2 = 0;
now when you press go its must do the math.
but after you pressing Go its show me the number 0, its must be bcuz its not reading from the textbox's the numbers of the user.
anyone can help?