XML : How to navigate though xml nodes?

I have two buttons and three labels in a windows form and a xml file.

this is my xml:

  <Qustions>    <Question id="1" Cat="5">      "Question Text 1"    </Question>    <Question id="2" Cat="2">      "Question Text 2"    </Question>    <Question id="3" Cat="3">      "Question Text 3"    </Question>    <Question id="4" Cat="5">      "Question Text 4"    </Question>    <Question id="5" Cat="8">      "Question Text 5"    </Question>  </Qustions>    

I want to show every question body and category in my form and navigate through them by buttons.

which way is the best approach to achieve this. any help will be appreciated.

thanks.