title: The tools version "15.0" is unrecognized
body: <p>I have created a project with <strong>Visual Studio 2017</strong> on my PC at home.
  But when I try to open it with <strong><a href="http://en.wikipedia.org/wiki/SharpDevelop" rel="noreferrer">SharpDevelop</a></strong> it says:</p>
  
  <blockquote>
    <p>"The tools version "15.0" is unrecognized."</p>
  </blockquote>
  
  <p>My <strong>SharpDevelop</strong> is on a USB stick, so I use it on different computers. Is there a way to fix this or can I change the tool version somehow?</p>
  
  <p><a href="https://i.stack.imgur.com/7lpNx.png" rel="noreferrer"><img src="https://i.stack.imgur.com/7lpNx.png" alt="Enter image description here"></a></p>