c# process xml file

I have the following xml file and need to loop through and process the js and css nodes in two steps. First I want to loop through the js, then the css.

<?xml version="1.0" encoding="utf-8" ?>
<files>
  <js>/_layouts/dir1/exportandsendwidget.js</js>
  <js>/_layouts/dir2/fm_grid_utils.js</js>
  <css>/_layouts/1033/test.css</css>
  <css>/_layouts/1033/test2.css</css>
</files>

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