title: How to set the CornerRadius of a UWP TextBox without copying and updating the whole default TextBox style?
body: <p>I can copy the default style from <a href="https://msdn.microsoft.com/en-us/library/windows/apps/mt299154.aspx" rel="nofollow noreferrer">there</a> and modify it to set the <code>CornerRadius</code> of the borders.</p>
  
  <p>However, I find it heavy. Isn't there a way to just tell my <code>TextBox</code> to use a <code>ControlTemplate</code> to derive from the default one with "just" a property changed?</p>