http://timjones.tw/blog/archive/2015/10/06/introducing-hlsl-tools-for-visual-studio

HLSL Tools is a Visual Studio extension - for VS2013 and VS2015,
Community Edition upwards - that provides enhanced support for editing
High Level Shading Language (HLSL) files.

You can install HLSL Tools from within Visual Studio (Tools > Extensions and Updates, search for “HLSL Tools”)
or download it from the Visual Studio Gallery
and here’s the GitHub repo