title: Visual Studio 2017 disable Dependency Validation
body: <p>How to disable Dependency Validation in Visual Studio 2017 RC?
  Whenever I open C# solution it always shows me a message in the Solution Explorer: "One or more projects needs to be updated to perform dependency validation" with an Update button.
  When I opened it for the first time, it performed some automatic update of packages and config files that I had to remove later.</p>
  
  <p>I need to share the solution between VS2017 and VS2015 and don't want to introduce any backward incompatabilities.</p>