title: Opening Visual Studio 2017 projects in Visual Studio 2015
body: <p>I've moved on to Visual Studio 2017 RC, but we still have people working on Visual Studio 2015. Currently when I create a project on 2017, it won't work on 2015. When the project is opened on VS2015 I keep getting the yellow triangles saying that there's a problem. And it won't build. </p>
  
  <p><a href="https://i.stack.imgur.com/ckJRH.png" rel="noreferrer"><img src="https://i.stack.imgur.com/ckJRH.png" alt="enter image description here"></a></p>
  
  <p>The error message associated with the yellow triangles is that it can't find those files. I am thinking that the issue is because of the new .csproj file that VS2017 uses instead of the project.json file that .net core has been using until now.</p>
  
  <p><a href="https://i.stack.imgur.com/PeZTW.png" rel="noreferrer"><img src="https://i.stack.imgur.com/PeZTW.png" alt="enter image description here"></a></p>
  
  <p>I thought that the projects created on VS2017 were backwards compatible with 2015. I guess they are not. Does anyone know if there's any way to create a project that can be worked on both VS2015 and VS2017? Thanks! </p>