>>128
File Nesting
https://visualstudiogallery.msdn.microsoft.com/3ebde8fb-26d8-4374-a0eb-1e4e2665070c?SRC=VSIDE

使い方は下記の動画を参照
https://channel9.msdn.com/Blogs/MadsKristensen/Introducing-File-Nestor-for-Visual-Studio