title: CLR 2.0 vs 4.0 performance?
body: <p>Will a .NET program compiled for CLR 2.0 run faster if running unden CLR 4.0?</p>
  
  <p>app.config:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8" ?&gt;
  &lt;configuration&gt;
    &lt;startup&gt;
      &lt;supportedRuntime version="v4.0.30319" sku=".NETFramework,Version=v4.0,Profile=Client" /&gt;
      &lt;supportedRuntime version="v2.0.50727"/&gt;
    &lt;/startup&gt;
  &lt;/configuration&gt;
  </code></pre>