title: Dynamic in the immediate window causes 'Microsoft.CSharp.RuntimeBinder.Binder' is not defined or imported error
body: <p>If I use <code>dynamic</code> in the immediate window of Visual Studio I get an error</p>
  
  <blockquote>
    <p>Predefined type 'Microsoft.CSharp.RuntimeBinder.Binder' is not defined or imported</p>
  </blockquote>
  
  <p>How can I fix that?</p>