Sets the Cache-Control: max-age HTTP header based on the specified time span.
Assembly: System.Web (in System.Web.dll)
delta is less than 0 or greater than one year.
Max-age is the maximum absolute time a document is allowed to exist before being considered stale.
The method does not use sliding expiration and will fail if the expiration date violates the principle of restrictiveness.
is introduced in the .NET Framework version 3.5. For more information, see .NET Framework Versions and Dependencies.
If the method is called repeatedly, on the second and subsequent calls, the value of the maximum age can only be decreased.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.