Assembly: System (in system.dll)
The file attribute of the <appSettings> section specifies a relative path to an external file that contains 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's root element must match the section referring to it.
Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter EditionThe Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.