title: What parameter to serialize for saving location of WPF GridSplitter?
body: <p>I want to save the location of a <code>GridSplitter</code> used to separate two grid columns.</p>
  
  <p>What should I serialize? The <code>Width</code> of the column before the splitter? The <code>Left</code> property of the splitter? The size and position of the window itself it serialized separately.</p>