title: Generate a class diagram from Visual Studio
body: <p>I would like to generate a class diagram with relations for my visual studio project. I opened my solution, added a new <code>ModelingProject</code>, added a new <code>.classdiagram</code> file but when i want to drag my folders or my classes onto the diagram layout I get the "not available" sign.</p>
  
  <p>Does anyone has any idea on how to fix this ?</p>
  
  <p><img src="https://i.stack.imgur.com/DuRmB.png" alt="Prove"></p>