title: Using Directives Sorted in Wrong Order
body: <p>I'm using the Power Commands extension with Visual Studio 2012. I have the option checked to remove and sort usings on save. The problem is that the System.Xxx directives are being sorted last, and that's causing a style analysis error:</p>
  
  <blockquote>
    <p>SA1208: System using directives must be placed before all other using directives.</p>
  </blockquote>
  
  <p><strong>Before save:</strong></p>
  
  <pre><code>using System;
  using System.Diagnostics.CodeAnalysis;
  using Foo;
  </code></pre>
  
  <p><strong>After save:</strong></p>
  
  <pre><code>using Foo;
  using System;
  using System.Diagnostics.CodeAnalysis;
  </code></pre>
  
  <p>This worked correctly (System.Xxx first) with VS 2010. Anyone know how to correct this?</p>
  
  <p>Note: Even if it didn't cause an SA error, I'd still prefer the system directives to be first.</p>