There are two kinds of files that VS.NET will not add to source control. One is the <projectname>.<language>proj.user file. This contains per-user settings for each project, as described in Chapter 1, so it would be inappropriate for all developers to use one central copy of such files. Since these files contain nothing that affects the build output, nothing is lost by omitting them from source controlit simply allows each member of the team to customize the way in which she works with the projects within VS.NET. The other type of file that is not added to source control is the <solutionname>.suo file. This file does much the same job as the .user files, except it stores per-user settings at the solution level rather than the project level.