title: VS-Code installing omnisharp error unable to verify the first certificate
body: <p>When attempting to install the Omnisharp Visual code extensions on my work machine, downloading the package fails and the extension does not install.  </p>
  
  <p>VS-Code version: 1.27.2</p>
  
  <p>When I open a c# file the output window displays</p>
  
  <pre><code>Installing C# dependencies...
  Platform: win32, x86_64
  
  Downloading package 'OmniSharp for Windows (.NET 4.6 / x64)'... Failded at stage: downloadPackages
  
  Error unable to verify the first certificate
  </code></pre>
  
  <p>I haven't got a particularly detailed knowledge of my work's network and firewall setup but from reading around it is pointing towards that being the culprit.</p>