title: Unresolved reference to symbol 'Property:NETFRAMEWORK45' in section 'Product:*'
body: <p>I am getting an error when building an app in TFS 2010.  Unresolved reference to symbol 'Property:NETFRAMEWORK45' in section 'Product:*'. This is for Wix 3.9</p>
  
  <p>The Wix package has NetFxExtension referenced. I can build the wix on my local machine fine, but when I go to build it through TFS I get the error. Can anyone help me figure this out? I have the below code that is causing the error.</p>
  
  <pre><code>&lt;PropertyRef Id="NETFRAMEWORK45"/&gt;
  &lt;Condition Message="This application requires .NET Framework 4.5. Please install the .NET Framework 4.5 then run this installer again."&gt;
    &lt;![CDATA[Installed OR NETFRAMEWORK45]]&gt;
  &lt;/Condition&gt;
  </code></pre>