Increment in _work directory

Question

What causes the folder name under \'_work\' to change on a Private Agent?

We are currently using _work/10/s etc. It has used this for the last few builds, but what would

Answer 1

Each build definition gets its own folder. This allows for total isolation of source code and build outputs.

You should never rely on hard-coding this path; you can reference a build's working directory with the $(System.DefaultWorkingDirectory) variable.