title: Compact Framework - System.Threading.Timer stops when the user turns off the screen
body: <p>I have an application that needs to "poll" a webservice to see if the user has any new messages waiting.  I have no control over the webservice so I cannot switch to a "push" mechanism, I'm stuck making a request every X number of seconds to see what's available.</p>
  
  <p>I am using a System.Threading.Timer to make the request every so often, but am encountering a few problems.  The biggest is that it stops running when the phone is sent into "standby" mode (screen off, but still able to get calls and email/txt notifications).  </p>
  
  <p>I'd really like it to behave like other background applications.  What can I do to make it work without being too big of a drain on the battery?</p>