title: XAML Border vs Rectangle
body: <p>I want to get a window like this <img src="https://i.stack.imgur.com/dtSTZ.png" alt="enter image description here"></p>
  
  <p>How should i get this and i am confused between Border and Rectangle in XAML.</p>
  
  <p>Border is a container control aos its use is pretty simple to get, what is the use of ractangle as it can't contain any control in it.</p>
  
  <p>Kindly help</p>