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Asked: 2026-06-12T06:53:18+00:00

i see that there are two version of ActionFilterAttribute class. System.Web.Mvc.ActionFilterAttribute and System.Web.Http.Filters.ActionFilterAttribute what

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i see that there are two version of ActionFilterAttribute class.
System.Web.Mvc.ActionFilterAttribute and System.Web.Http.Filters.ActionFilterAttribute

what is different?

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  1. Editorial Team

    The System.Web.Http one is for Web API; the System.Web.Mvc one is for previous MVC versions.

    You can see from the source that the Web API version has several differences.

    • It has OnResultExecuting and OnResultExecuted handlers (“Called by the ASP.NET MVC framework before/after the action result executes.”)
    • It can be executed asynchronously
    • It does not let you specify an order of execution
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