The values for Private and Public are strings and must be enclosed in quotation marks (" ").
The CacheControl, Expires, and ExpiresAbsolute properties have been deprecated in favor of the methods of the HttpCachePolicy class available through the Cache intrinsic object to control the IIS output cache and client caches.
Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.