VS2015: warning MSB3884: Could not find rule set file

Question

After upgrading my WinForms VS2013 project to VS2015, I started seeing the MSB3884 \"Could not find rule set file\" warning.

A Google search turned up one MSDN article,

Answer 1

Had this when compiling a solution upgraded from VS2015 to VS2017 but had MSBuild 14 in the path (C:\Program Files (x86)\MSBuild\14.0\Bin). Changed to ensure 15 was in the path (C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\15.0\Bin) and all worked.