title: ASP.Net JSON configuration file transforms with arrays
body: <p>I have a base configuration file eg. </p>
  
  <p>appsettings.json</p>
  
  <pre><code>{
      "Values": {
          "Test": ["one", "two"]
      }
  }
  </code></pre>
  
  <p>and</p>
  
  <p>appsettings.dev.json</p>
  
  <pre><code>{
      "Values": {
          "Test": ["three"]
      }
  }
  </code></pre>
  
  <p>and after transforming, the array would be</p>
  
  <pre><code>["three", "two"]
  </code></pre>
  
  <p>How do I make sure the transformed array is shrunk to a smaller number of elements rather than each element changing individually?</p>