title: In Visual Studio, what does the "Clean" command do?
body: <p>You know, the one that outputs this=></p>
  
  <blockquote>
    <p>------ Clean started: Project: Foo.Bar, Configuration: Debug Any CPU ------<br>
    ========== Clean: 1 succeeded, 0 failed, 0 skipped ==========</p>
  </blockquote>
  
  <p>What it is cleaning?</p>