Custom scaffolding xproj project

Question

I'm trying to write a custom scaffolding for my asp.core project in visual studio. I created new extensibility project that use SideWaffle templates to generate files and necessary staff. I have problem with one line. My CodeGenerator context can't get valid codeLanguage from xproj project. Csproj project work fine. Maybe someone have similar problem and can help me ?

var codeLanuguage = Context.ActiveProject.GetCodeLanguage();