title: Unable to build a cross platform apps on Xamarin.forms?
body: <p>I'm following a <a href="https://developer.xamarin.com/guides/xamarin-forms/getting-started/hello-xamarin-forms/quickstart/" rel="nofollow noreferrer">tutorial</a> to create a cross-platform app using <code>xamarin.forms</code>
   except that I'm using Windows 7 and hence I skipped those steps for <code>UWP</code> part. </p>
  
  <p>Now when I trying to build the solution, I'm getting the below error message</p>
  
  <blockquote>
    <p>1>  No way to resolve conflict between "mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" and "mscorlib, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e". Choosing "mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" arbitrarily.</p>
  </blockquote>
  
  <p>Based on findings on the net it seems that something to do with versioning messed up however this should not happen as it's a new solution from scratch.</p>
  
  <p>I've also checked the properties that stated as below:</p>
  
  <pre><code>- "Compile using android version (Android 7.1(Nougat))"
  - Android Manifest "Target Android version" Use compile using SDK version
  </code></pre>
  
  <p>Well to be exact, the build was successful but with error logging as output. Please refer to below image</p>
  
  <p><a href="https://i.stack.imgur.com/uKvBp.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/uKvBp.png" alt="enter image description here"></a></p>
  
  <p>May I know what else I can try?</p>