.VSI File Extension

Visual Studio installation package that may contain starter kits, item templates, controls, code snippets, add-ins, or other types of files; used for exchanging Visual Studio content within the developer community; also referred to as a "community component."

Visual Studio content installation packages are compressed using ZIP compression. They are similar to .ZIP files, but use the ".vsi" extension instead. VSI files can be created and signed using the MakeZipExe program.