Since Visual Studio 2015 has support for shaders, wouldn’t it make sense to include them in the project files?
I can toggle Show All Files and filter .shader and .cginc and open/include the shaders. When the project files are refreshed I have to repeat that step.
I have no problem editing shaders by double clicking them inside the unity editor which opens them in VS automatically. What specifically are you having a problem with?
I want to be able to use the quick search function (ctrl+f) in Visual Studio to find a keyword in several shaders. The quick search only works for files included in projects.
In case Unity staff is looking at this post, I reported this issue as: (Case 715442) VSTU: Solution does not contain shader files
Oh! Go to Editor Settings, there’s a new section “C# Project Generation” with a field “Additional extensions to include”, There you can add “cginc;shader” and they will be included!
Guess you can close this topic and issue 715442. 
Although maybe they could be included by default.
And don’t forget .compute files 
They forgot .compute files 
Adding it in the additional extensions doesn’t seem to be respected either
Any updates on this? It’s really frustating to work on anything compute based right now