title: Windows.Networking.Proximity C#
body: <p>I want to add "Windows.Networking.Proximity"  Namespace to C# project. 
  How can I add that? That is not available in the project. </p>
  
  <p>When I'm adding the reference attached error coming. Any idea?</p>
  
  <p><a href="https://i.stack.imgur.com/CbOJG.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CbOJG.png" alt="enter image description here"></a></p>