Assembly: System (in system.dll)
The file attribute of the appSettings section specifies a relative path to an external file containing custom application-configuration settings. The details provided in the file act as an appSettings section in the configuration file. The file is accessed using the NameValueFileSectionHandler class. The file must have its root element match the section referring to it.
Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.