Commented Unassigned: @helper - wrong class name [171]

I have a razor helper in App_Code/MyHelpers.cshtml

The generated class name in obj/CodeGen is "public class _App_Code_MyHelpers_cshtml"

And of course all my views throw compile errors when referencing "MyHelpers.Something"
Comments: If I add @* GeneratePrettyNames : true *@ the generated class's namespace is still not accessible in the view-classes "namespace ProjectName.App_Code" Razor-helpers simply do not work out of the box. And there's no docs on how to work this around. This is an issue.