asp.net - 'Owin.IAppBuilder' does not contain a definition for 'MapSignalR' -

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error

'owin.iappbuilder' not contain definition 'mapsignalr' , no extension method 'mapsignalr' accepting first argument of type 'owin.iappbuilder' found (are missing using directive or assembly reference?)

code

using microsoft.owin; using owin;  [assembly: owinstartup(typeof(signalrchat.startup))] namespace signalrchat {     public class startup     {         public void configuration(iappbuilder app)         {             // connection or hub wire , configuration should go here             app.mapsignalr();         }     } }

any appreciated...

update

signalr version 2.0.3
microsoft owin version 2.0.2
owin version 1.0.0
visual studio 2012

only install nuget:

install-package microsoft.aspnet.webapi.owinselfhost


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