help me . VB解析 XML.

<?xml version="1.0"?>
<school>
  <grades>
    <grade>
      <level>K</level>
      <student_count>
        <boys>49</boys>
        <girls>41</girls>
      </student_count>
    </grade>
    <grade>
      <level>1</level>
      <student_count>
        <boys>29</boys>
        <girls>32</girls>
      </student_count>
    </grade>
    <grade>
      <level>2</level>
      <student_count>
        <boys>26</boys>
        <girls>31</girls>
      </student_count>
    </grade>
  </grades>
  <principal>
    <name>Dr. Hamilton</name>
    <experience timein="years">
      <time>14</time>
    </experience>
  </principal>
  <classrooms />
</school>


VB xmlDOM 解析 xml. help me ~~~~

补充：.NET技术 ,  VB.NET