title: How do I add Ajax to my ASPnet page so that a dropdown change can immediately affect the backend db
body: <p>I have a couple of dropdown boxes on a normal ASP.Net page.</p>
  
  <p>I would like the user to be able to change these and to have the page Pseudo-post back to the server and store these changes without the user having to hit a save button.</p>
  
  <p>I don't really need to display anything additional as the dropdown itself will reflect the new value, but I would like to post this change back without having the entire page flash due to postback </p>
  
  <p>I have heard that this is possible using AJAX.Net... </p>
  
  <p>Can someone point me in the right direction?</p>