What are all these *.FileListAbsolute.txt files for?

Question

What are the *.FileListAbsolute.txt files for that Visual Studio generates? They keep cluttering up my searches. Such as when I search for *.csproj for adding projects to a .sln

Answer 1

The FileListAbsolute.txt file contains the list of files built in the current build and in prior builds, and is used during a Clean and Rebuild to figure out which files to delete.

The file is necessary because in certain situations, such as a project that has been renamed, you want the Build system to be able to delete the older name.