title: How can I get this vaue from XML?
body: <p>I have this XML :</p>
  
  <pre><code>&lt;meteo_italia&gt;
      &lt;localita&gt;
          &lt;id&gt;2861&lt;/id&gt;
          &lt;nome&gt;Foppolo&lt;/nome&gt;
          &lt;prov&gt;BG&lt;/prov&gt;
          &lt;capoluogo&gt;0&lt;/capoluogo&gt;
          &lt;regione&gt;LOMBARDIA&lt;/regione&gt;
          &lt;previsione time="2011-10-28T06:00"&gt;
              &lt;id_tempo&gt;6&lt;/id_tempo&gt;
              &lt;desc_tempo&gt;temporali isolati&lt;/desc_tempo&gt;
              &lt;temp&gt;2&lt;/temp&gt;
              &lt;press&gt;1024.3&lt;/press&gt;
              &lt;um_rel&gt;78&lt;/um_rel&gt;
              &lt;zerot&gt;3000 m&lt;/zerot&gt;
              &lt;qn&gt;ND&lt;/qn&gt;
              &lt;v_dir&gt;ESE&lt;/v_dir&gt;
              &lt;v_int&gt;4 nodi&lt;/v_int&gt;
              &lt;ore_s&gt;3&lt;/ore_s&gt;
              &lt;prec&gt;0-10mm&lt;/prec&gt;
          &lt;/previsione&gt;
          &lt;previsione time="2011-10-28T12:00"&gt;
              &lt;id_tempo&gt;6&lt;/id_tempo&gt;
              &lt;desc_tempo&gt;temporali isolati&lt;/desc_tempo&gt;
              &lt;temp&gt;11&lt;/temp&gt;
              &lt;press&gt;1024.9&lt;/press&gt;
              &lt;um_rel&gt;46&lt;/um_rel&gt;
              &lt;zerot&gt;3550 m&lt;/zerot&gt;
              &lt;qn&gt;ND&lt;/qn&gt;
              &lt;v_dir&gt;SSO&lt;/v_dir&gt;
              &lt;v_int&gt;3 nodi&lt;/v_int&gt;
              &lt;ore_s&gt;3&lt;/ore_s&gt;
              &lt;prec&gt;0-10mm&lt;/prec&gt;
          &lt;/previsione&gt;
  
          ... XML continues...
  </code></pre>
  
  <p>and I'd like to extract the value <code>temp</code> from the second node <code>previsione</code> on C#.</p>
  
  <p>Tried with :</p>
  
  <pre><code>using (var wc = new WebClient())
  {
      m_strFilePath = wc.DownloadString(xmlMeteo);
  }
  
  XmlDocument myXmlDocument = new XmlDocument();
  myXmlDocument.LoadXml(m_strFilePath);
  
  try
  {
      Response.Write("Value : " + myXmlDocument.SelectSingleNode("//previsione[position()=0]//temp").Value);
  }
  catch { }   
  </code></pre>
  
  <p>but I can't get it.</p>