Recently I've tried to use some C# 6 new feature (interpolated strings) in my ASP.NET MVC (5) .cshtml view, but when running got an error message complaining about the `$`. It is clear the compiler in C# 5 compatibility mode, or worst it *is* a C# 5 compiler. 

When in editor a popup warning warns me (I do not know it is VS or ReSharper) `Feature 'Interpolated strings' is not available in C# 5. Please use language version 6 or greater.`

The project itself was set to C# 6, and I can use C# 6 features in my build time compiled code like controllers etc. 

Q: Where should I set page compiler version, *and will this C# 6 compiler available when I deploy my web app to Azure there?*