MSbuild Error: The builds tools for v140 (Platform Toolset = 'v140') cannot be found

Question

I have a solution which is consists of a large number of projects (C++ and C#). I upgraded the solution to VS2015, so the toolset version for most of them are now set to V14

Answer 1

This solution worked perfectly for me: https://social.msdn.microsoft.com/Forums/vstudio/en-US/e0b9c601-2ece-4dcc-bac3-23ed7dd6801a/the-builds-tools-for-v120-platform-toolset-v120-cannot-be-found?forum=vclanguage