title: Parsing xml files in windows phone 7
body: <p>i have the following xml file </p>
  
  <pre><code>&lt;entry&gt;
  &lt;math marks&gt;45&lt;/math marks&gt;
  &lt;eng marks&gt;67&lt;/eng marks&gt;
  &lt;phy marks&gt;56&lt;/phy marks&gt; 
  &lt;/entry&gt;
  </code></pre>
  
  <p>i wish to parse this xml file in windows phone 7 such that i can extract the values for each tag, for example math marks has value 45, and save them in a variable of type double and perform some mathematical operations on the created variable. </p>
  
  <p>How can i do this? </p>