title: Error: Typescript Feature 1.5. Current language level is 1.4
body: <p>I am working in the context of Visual Studio 2015 (with Resharper), and am referencing a TypeScript definitions file for NodeJS.  I have 3 other VS projects that are using <code>node.d.ts</code> without problems.  In this new project, however, I now have 146 errors saying the same thing:  </p>
  
  <blockquote>
    <p>"Typescript Feature 1.5.  Current language level is 1.4".</p>
  </blockquote>
  
  <p>For the life of me, I can't figure out how to tell Visual Studio (or Resharper?) to use the latest TypeScript language version.  </p>
  
  <p>I've tried:  <strong>Tools > Options > Typescript > Project > General > ECMAScript6</strong> (selected) and it didn't work.</p>
  
  <p>Also:</p>
  
  <pre><code>npm install -g typescript
  </code></pre>
  
  <p>and it didn't work as well.</p>
  
  <p>How do I tell VS to use Typescript 1.5.3 (which <code>node.d.td</code> is asking for)?</p>