Parameters

context

An System.Web.HttpContext object that contains information about the current Web request.

custom

The custom string that specifies which cached response is used to respond to the current request.

Returns

If the value of the custom parameter is "browser", the browser's System.Web.Configuration.HttpCapabilitiesBase.Type; otherwise, null.

Remarks

You can override HttpApplication.GetVaryByCustomString(HttpContext, string) to add a new method for calculating custom vary-by values that are based on the current request. The implementation has to call the base class for custom values that it does not recognize. For more information, see How to: Cache Versions of a Page Using Custom Strings.

Requirements