title: Using string interpolation and nameof in .VS 2015 NET 4.5
body: <p>I'm using things like <code>$"hello {person}"</code> and <code>nameof(arg1)</code> in my code, but on checking the project properties I'm targeting .NET 4.5.</p>
  
  <p>Is this okay?  I thought these things were introduced in 4.6.</p>
  
  <p>The project builds and runs okay on my machine - but I'm worried something will go wrong when I deploy it.</p>