title: Class library that can be shared between .NET Framework and .NET Core
body: <p>I have a big class library written in .NET 4.0 but when I reference it in a Store App that uses .NET Core, it shows an error. And further, Microsoft just released .NET Core for the next version of .NET.</p>
  
  <p>I want to know what type of project will be able to be shared by both .NET 4.6 and .NET Core? Is a class library able to do that?</p>
  
  <p>It seems that the release of .NET Core specialized for Store Apps causes confusion for me.</p>