How to detect if .net framework 4.0 is installed on a machine?
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/199080/how-to-detect-what-net-framework-versions-and-service-packs-are-installed">How to detect what .NET Framework versions and service packs are installed?</a>  </p>
</blockquote>



<p>How to know whether <strong>.NET FRAMEWORK 4.0</strong> is installed on my computer or not?</p>

<p>I want to install IIS Express. I have VS2010 Ultimate and Windows XP SP3</p>

<p>What should I do to get IIS Express and integrate with visual studio?</p>
