title: Empty an MSBuild ItemGroup
body: <p>Is there a way to remove the contents of an ItemGroup without resorting to Targets?  I'm looking for something equivalent to:</p>
  
  <pre><code>&lt;ItemGroup&gt;
    &lt;MyItemGroup Remove="@(MyItemGroup)"/&gt;
  &lt;/ItemGroup&gt;
  </code></pre>
  
  <p>Thanks</p>