title: Missing references errors on Visual Studio 2015
body: <p>I have a solution with a project that i developed using <em>Visual Studio 2013</em> and it was working as intended. I then formatted my computer to upgrade to <em>Windows 10</em> and decided to install <em>Visual Studio 2015</em> instead and now I'm getting a lot of missing reference errors when they are installed, does anyone know why this is happening and how to fix it?</p>
  
  <p>Some of the errors:</p>
  
  <p><a href="https://i.stack.imgur.com/pQxMu.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/pQxMu.png" alt="Errors"></a></p>
  
  <p>A good example is that I have <code>Microsoft.Net.Http</code> package installed but it's not recognizing it where I have <code>using System.Web.Http;</code></p>
  
  <p>I installed <em>Visual Studio 2015</em> with the same user I'm using to run it (It's a personal computer and I'm the single user) and am running it as administrator.</p>
  
  <p>If you need any extra information please leave a comment and I'll edit the question.</p>