title: Upgrading WSP using Powershell
body: <p>I've run the <code>Update-SPSolution</code> command which I am guessing has worked as I have no errors returned. However, my extra feature in the WSP file doesn't show in the site collection features.</p>
  
  <p>I've never really upgraded a solution I've always done the long winded retract it all and then reinstall. This is possibly down to my lack of understanding and I have been told upgrading can be sketchy by several people I have worked with.</p>
  
  <p>How come the extra feature hasn't shown up in my collection features?</p>
  
  <p>Does the upgrade solution only replace the WSP file and then you need to run the install command again? </p>
  
  <p>If anyone could point out some decent articles on this it would be hugely appreciated.</p>
  
  <p>I have managed to get the feature installed by re running the install solution powershell command and it seems to have worked!</p>
  
  <p>However is this best practice? I can't see any detrimental affect of doing it this way currently!</p>