The old asp.net 2.0 project can't run under Microsoft Visual Web Developer 2010 Express
<p>Before a asp.net 2.0 + ajax 1.0 projact can run well under Microsoft Visual Web Developer 2005 Express</p>

<p>Now When I try to run it under Microsoft Visual Web Developer 2010 Express, I get the following error.</p>

<p>I don't want to upgrade the project to Vs 2010, how can I do? Thanks! </p>

<blockquote>
  <p>Could not load file or assembly System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"</p>
</blockquote>
