title: Showing a window WPF that is already set/design
body: <p>I have already set/designed window, with textboxes, buttons, and all. When I need to open up this window. </p>
  
  <pre><code>Window win2 = new Window(); 
  ..
  ...
  ....
  
  win2.Show();
  </code></pre>
  
  <p>I got a <strong>NEW</strong> <code>win2</code> with reset to default window properties like the sizes and my <code>textboxes</code> are gone. </p>
  
  <p>How can I load my already set/designed window WPF?</p>