SUO

The suo file extension is associated with Microsoft Visual Studio. Microsoft Visual Studio uses two file types (sln and suo) to store settings specific to solutions.

These files, known collectively as solution files, provide Solution Explorer with the information it needs to display a graphical interface for managing your files. They allow users to concentrate on their projects and final goals rather than on the environment itself each time they return to their development tasks.

The suo files records all of the options that you might associate with your solution so that each time you open it, it includes customizations that you have made.

The suo file is in binary format referenced by VSPackages and opened by the LoadUserOptions Method and modified by the WriteUserOptions and SaveUserOptions methods.

A file of this type is named: ApplicationName.suo

This file is stored in the same folder where the ApplicationName.sln file is stored. It is not a good idea to share this file on a source-control system. However, if only one user works on that computer, this file is available with the local copy of the project. You can copy these settings to another computer by copying the suo file to the corresponding folder when you import the applicable settings.