c# - Type or namespace name 'OwinStartupAttribute' could not be found -

error

the type or namespace name 'owinstartupattribute' not found
type or namespace name 'owinstartup' not found

code

using microsoft.owin; using owin;  [assembly: owinstartup(typeof(employee.web.models.startup))] namespace employee.web.models.startup {     public class startup     {         public void configuration(iappbuilder app)         {             app.mapsignalr();         }     } }   

any appreciated.

using:

• .net 4.0
• mvc 4
• microsoft.aspnet.signalr.systemweb (1.1.0.0)
• microsoft.owin (2.1.0.0)
• microsoft.owin.host.systemweb (2.1.0.0)
• owin (1.0.0.0)
• visual studio 2013

installed singlar after referencing microsoft.owin using command install-package microsoft.aspnet.signalr -version 1.1.3

update: removed [assembly:.. , added in web.config: <add key="owin:appstartup" value="employee.web.models.startup" />

the error says
'owin.iappbuilder' not contain definition 'mapsignalr' , no extension method 'mapsignalr' accepting first argument of type 'owin.iappbuilder' found

create 1 class name startup you..

public class startup {    public void configuration(iappbuilder app)    {       app.mapsignalr();    } } 

in addition this, if startup class somehow not in default name space, add web config line area like: <add key="owin:appstartup" value="[namespace].startup" />

here more explenation.