title: No projects supported by NuGet in the solution
body: <p>I created a new Dev Express Winforms project using the XAF Wizard.
  Normally this works fine, however I have been playing with installing Dev Express from Nuget recently.</p>
  
  <p>Following <a href="http://blog.delegate.at/2017/12/08/xaf-bestpractices-2017-01.html" rel="noreferrer">this excellent blog from Manuel Grundner</a></p>
  
  <p>All the references in the new project create correctly except for Entity Framework.</p>
  
  <p>When I try to run Tools->NuGet Package Manager->Manage NugetPackages for Solution</p>
  
  <p>I get an error</p>
  
  <p>Operation failed
     No projects supported by NuGet in the solution</p>
  
  <p><a href="https://i.stack.imgur.com/HJik9.gif" rel="noreferrer"><img src="https://i.stack.imgur.com/HJik9.gif" alt="General"></a></p>
  
  <p><a href="https://i.stack.imgur.com/WWx4f.gif" rel="noreferrer"><img src="https://i.stack.imgur.com/WWx4f.gif" alt="sources"></a></p>
  
  <p>I thought I might try update-package from the Package Manager Console however the Default project combo is empty.</p>