title: How to detect Windows Phone 8.1 OS version programmatically?
body: <p>The question in title is not the real problem. I went through many sites and blogs and go to know that Environment.OSVersion gives you the current OS version of the phone using our app. But the problem is, There is no OSVersion under the class Environment. Please refer the screenshot for better understanding. </p>
  
  <p>My question why I am not able to see the OSVersion property under Environment class? Am I missing something?<img src="https://i.stack.imgur.com/Bi3rw.png" alt="enter image description here"></p>