Gets or sets a value indicating whether the vary header is enabled.
Assembly: System.Web (in System.Web.dll)
The vary header indicates the request-header fields that the server uses to determine which of multiple cached responses are sent in response to a client request. The default for the property is false. By default, ASP.NET sends the vary header in all POST requests, as well as in all GET-request query strings. If the is true, ASP.NET omits the vary header when returning the response for cached pages, provided that the GET request to a response is cached with no VaryByCustom property and the POST request to a response is cached with no VaryByParam property and no VaryByCustom property.
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.