title: Xamarin.forms nugetpackage conflicting and endless update
body: <p>My app is a <code>pcl</code> app and it displays that there is update for following nuget packages </p>
  
  <p><a href="https://i.stack.imgur.com/soLBu.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/soLBu.png" alt="enter image description here"></a>
  <a href="https://i.stack.imgur.com/fa0cR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/fa0cR.png" alt="enter image description here"></a></p>
  
  <p>But if I update those, it displays that there is another update for Xamarin.forms package. If I install that, it shows again first screen there are 6 more updates. then it goes in endless loop.</p>
  
  <p>Only difference droid project for xamarin.forms package as you can see before and after. It was downgraded to version 1.5.1.6571. Why is it happening? how can I resolve this endless update loop? I thought maybe it is the project but on another project, I have the same conflict</p>
  
  <p><a href="https://i.stack.imgur.com/hyMn4.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/hyMn4.png" alt="enter image description here"></a></p>