title: Visual Studio 2013 or 2015 EditorPackage did not load correctly constantly
body: <p>When starting Visual Studio 2013 Pro (Update 4 installed) I very often get this error message (several times a day now) for the past about two weeks:</p>
  
  <blockquote>
    <p>The 'Microsoft.VisualStudio.Editor.Implementation.EditorPackage' package did not load correctly.</p>
  </blockquote>
  
  <p>I know I can correct this problem by closing Visual Studio and deleting:</p>
  
  <pre><code>%LocalAppData%\Microsoft\VisualStudio\12.0\ComponentModelCache
  </code></pre>
  
  <p>I have never seen it before that time and as far as I found out in the Internet it was possibly introduced with Update 3.</p>
  
  <p>Well, the problem is that it is annoying to restart Visual Studio several times a day, and I was wondering if anyone else is experiencing this and knows how to solve it for good or what the cause is.</p>
  
  <p>I noticed that it happens extremely often if I work in more than one instance of Visual Studio in parallel. This one is a killer. But still I suspect a third-party component to be involved or it is the size of one of the solutions (about 70 projects). I tried to deactivate some extensions I newly installed and need for the big project, but to no avail.</p>
  
  <p>Just as information: I am working with <a href="http://en.wikipedia.org/wiki/C_Sharp_%28programming_language%29" rel="noreferrer">C#</a>. When working in parallel with projects open in several instances of Visual Studio I never had problems before.</p>
  
  <p>Does anyone have the same problem to this extend or possibly have a better solution than deleting the folder and restarting?</p>