The script engine application is self-sufficient and doesn't need to be integrated with OS in any way in order to execute a script. However during the installation some level of integration is achieved:

• PATH system environment variable is updated with the location of the script engine.
  Thus, the script engine file name in a command-line can be specified without directory part.

• CSSCRIPT_DIR system environment variable is created.
  Thus scripts from the Script Library folder (%CSSCRIPT_DIR%/Lib ) can be referenced from another scripts (see Script importing).

• Shell extension "Run as script" is installed.
  Thus, script can be run with a mouse right-click action.

• Shell extension(s) "Open as script" is installed (when appropriate).
  Thus, script can be opened in appropriate IDE with a mouse right-click action (see Development tools).

Note: the level of CS-Script integration with OS may very from version to version

See Also

Installation | Importing C# scripts | Development tools