Why? Because internally, the actual next number after 12.0 was 13.0. When that was skipped for marketing superstition, the engineering team simply bumped the major version to for VS 2015.
Let’s dig into the archaeology. During the early development cycles of what would become Visual Studio 2015 , Microsoft internally labeled the next release as Visual Studio 14.0 . Early previews, developer builds, and even some official documentation referred to the product as "Visual Studio 14" or "VS14." visual studio 14.0
The version number 14.0 is now less a product version and more a toolchain era . Visual Studio 14.0 (2015) shipped with .NET Framework 4.6. But the build system and project tooling recognized frameworks back to 4.5.2. That’s why you’ll see ToolsVersion="14.0" in .csproj files even today — it signals the MSBuild engine version, not the VS UI version. Let’s dig into the archaeology
So yes: