title: Add and display FixedDocument to WPF form
body: <p>I'm programmatically generating a <code>FixedDocument</code> to help me print.  <code>FixedDocument.ActualWidth</code> is coming out as <code>0</code>.  I suspect this is because I am not actually displaying the FixedDocument.  How can I add and display a <code>FixedDocument</code> object?  </p>
  
  <p>This is a beginner question.  I'm not skilled with WPF.  I looked on MSDN/Goog. Sites make the assumption that I've already added the FixedDocument and just need to manipulate it.</p>
  
  <p>I have:</p>
  
  <pre><code>    private FixedDocument CreateFixedDocumentWithPages()
      {            
          FixedDocument fixedDocument = CreateFixedDocument();
          fixedDocument.DocumentPaginator.PageSize = size;            
  
          PageContent content = AddContentFromImage();
          fixedDocument.Pages.Add(content);
  
          return fixedDocument;
      }
  </code></pre>
  
  <p>Pseudocode of what I want: <code>myWpfFormObject.AddChild(fixedDocument)</code></p>