title: MonoTouch error MT2002: Can not resolve reference
body: <p>I'm working on a iOS/MonoTouch project which is using a lot of reflection. Everything works great, but when I compile the <strong>Debug|iPhone</strong> version I get the error:</p>
  
  <blockquote>
    <p><strong>error MT2002: Can not resolve reference: System.Boolean System.Reflection.PropertyInfo::op_Equality(System.Reflection.PropertyInfo,System.Reflection.PropertyInfo)</strong></p>
  </blockquote>
  
  <p>Funny thing is that the Release|iPhone build works fine.</p>
  
  <p>What can be wrong?</p>