title: how to hide / collapse title bar in a UWP app?
body: <p>Is there a way to somehow hide / collapse / make temporarily invisible (but not fully disable) titlebar in a UWP app?</p>
  
  <p>I know that it is possible to make app fullscreen after which title bar automatically collapses, but I need to implement it in a resizable desktop window.
  I also know that you can customize appearance of titlebar, like color, etc.</p>
  
  <p>Reason: I have an application with a lot of windows and need to save screen space and have more room for client area of windows.</p>
  
  <p>I've read different sources, but couldn't find an answer:</p>
  
  <ul>
  <li>MSDN docs <a href="https://msdn.microsoft.com/en-us/library/windows/apps/windows.ui.viewmanagement.applicationviewtitlebar.aspx" rel="noreferrer">ApplicationViewTitleBar</a>, <a href="https://msdn.microsoft.com/en-us/library/windows/apps/windows.applicationmodel.core.coreapplicationviewtitlebar.aspx" rel="noreferrer">CoreApplicationViewTitleBar</a></li>
  <li><a href="http://blogs.msdn.com/b/eternalcoding/archive/2015/08/20/uwp-take-the-control-of-your-title-bar.aspx" rel="noreferrer">http://blogs.msdn.com/b/eternalcoding/archive/2015/08/20/uwp-take-the-control-of-your-title-bar.aspx</a></li>
  <li><a href="https://marcominerva.wordpress.com/2015/05/19/easily-manage-the-title-bar-in-windows-10-apps/" rel="noreferrer">https://marcominerva.wordpress.com/2015/05/19/easily-manage-the-title-bar-in-windows-10-apps/</a></li>
  </ul>
  
  <p>For example, there seems to be a solution for the same problem for WPF: <a href="https://stackoverflow.com/questions/8918518/how-to-remove-the-title-bar-from-a-window-but-keep-the-border">How to remove the title bar from a window but keep the border</a></p>