c# - Adding X-Frame-Options header to all pages in MVC 4 application -

i trying add x-frame-options header (with value set "deny") mvc 4 application. looked around , seems this cleanest way add pages.

however when add code not build. error on onresultexecuting of

"no suitable method found override."

public class xframeoptions : actionfilterattribute {     public override void onresultexecuting(           system.web.mvc.resultexecutingcontext filtercontext)     {         filtercontext.httpcontext.response.addheader(             "x-frame-options", "deny");     } } 

if cleanest way how can resolve error? there better way handle in mvc 4 application?

make sure inherit correct class:

public class xframeoptions : system.web.mvc.actionfilterattribute 

in asp.net mvc 4 there's web api has different namespace , since haven't explicitly specified namespace guess compiler picking wrong class:

system.web.http.filters.actionfilterattribute