title: Xamarin forms UWP: Exception thrown: 'System.TypeLoadException' in System.Private.CoreLib.ni.dll
body: <p>Getting the following exception after updating xamarin forms. </p>
  
  <blockquote>
    <p>Exception thrown: 'System.TypeLoadException' in System.Private.CoreLib.ni.dll
    An exception of type 'System.TypeLoadException' occurred in System.Private.CoreLib.ni.dll but was not handled in user code
    Could not load type 'Xamarin.Forms.Xaml.XamlResourceIdAttribute' from assembly 'Xamarin.Forms.Core, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null'.</p>
  </blockquote>
  
  <p>I have this problem after installing xamarin forms 3.1.0.912540 from 2.5.0.121934. </p>
  
  <p>Screenshot adding below:</p>
  
  <p><a href="https://i.stack.imgur.com/2pCZc.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2pCZc.png" alt="enter image description here"></a></p>