T4 is no longer just a tool used internally by VS, but is being increasingly used by developers for code generation. It would be great to have syntax highlighting, intellisense etc. out of the box.
I appreciate this is probably more of a Visual Studio feature request than an ASP.NET one, but as T4 is used a lot within ASP.NET projects, particularly MVC ones, I figure it's worth a mention.
This has been moved to the Visual Studio UserVoice – https://visualstudio.uservoice.com/forums/121579-visual-studio/suggestions/3793790-t4-editting
Marco van Kimmenade commented
Tangible T4 editor in combination with Oleg's T4 Toolbox does an awesome job at syntax highlighting, intellisense etc
Yes! this is not specific to asp projects. but neither to web projects. this is more a visual studio feature request.
Luke Bennett commented
Just noticed there's a Visual Studio Web Tools forum, this should probably go in there but I don't see any way to move it.