When overridden in a derived class, gets or sets the number of minutes before a page that is cached on the client or proxy expires. If the user returns to the same page before it expires, the cached version is displayed. is provided for compatibility with earlier versions of Active Server Pages (ASP).
Assembly: System.Web (in System.Web.dll)
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2