A project with an Output Type of Class Library cannot be started directly
<p>Please can someone could explain why I get this error and what to do to fix it (or what I'm doing wrong!). The steps I have taken are</p>

<ol>
<li>Download Source code from <a href="http://www.codeproject.com/Articles/16859/AForge-NET-open-source-framework" rel="nofollow">http://www.codeproject.com/Articles/16859/AForge-NET-open-source-framework</a></li>
<li><p>Opening in VS2010 shows the references cannot be found
<img src="http://i.stack.imgur.com/qQwcN.png" alt="enter image description here"></p></li>
<li><p>Re-Add all 3 references from <code>PlayingCardRecognition\bin\Release</code> so no further warnings 
<img src="http://i.stack.imgur.com/4qgtv.png" alt="enter image description here"></p></li>
<li><p>When I try and build or Run I get the following message
<img src="http://i.stack.imgur.com/lK1gN.png" alt="enter image description here"></p></li>
</ol>
