'Owin.IAppBuilder' does not contain a definition for 'MapSignalR'

### Error

> 'Owin.IAppBuilder' does not contain a definition for 'MapSignalR' and
> no extension method 'MapSignalR' accepting a first argument of type
> 'Owin.IAppBuilder' could be found (are you missing a using directive
> or an assembly reference?)


### Code

using Microsoft.Owin;
using Owin;

[assembly: OwinStartup(typeof(SignalRChat.Startup))]
namespace SignalRChat
{
public class Startup
{
public void Configuration(IAppBuilder app)
{
// Any connection or hub wire up and configuration should go here
app.MapSignalR();
}
}
}

Any help would be greatly appreciated...



### Update
signalR version 2.0.3
Microsoft Owin version 2.0.2
Owin version 1.0.0
Visual Studio 2012

Finally was able to solve it by adding ***signalR*** dependencies before adding signalR from NuGet Packages
Step's I followed:

1. Added Microsoft.Owin `//version 2.0.1`
2. Added Microsoft.Owin.Security `//version 2.0.1`
3. Added Microsoft Asp.Net SignalR

The reason I discovered was a problem with `version 2.0.2` of *Microsoft.Owin and Microsoft.Owin.Security* and then adding a class named ***`Startup.cs`*** with following code:

using Microsoft.Owin;
using Owin;

[assembly: OwinStartup(typeof(webApp.Startup))]
namespace webApp
{
public static class Startup
{
public static void Configuration(IAppBuilder app)
{
app.MapSignalR();
}
}
}

Directly adding `Microsoft Asp.Net SignalR` from NuGet adds `version 2.0.2 of Microsoft.Owin and Microsoft.Owin.Security` which creates the problem.
Hope it helps someone...!!

Update-Package Owin -Reinstall

worked for me

Asp.Net 5 empty mvc project out of the box creates something that looks like this



using Microsoft.Owin;
using Owin;
namespace DeadlyChat
{
public class Startup
{
// For more information on how to configure your application, visit

[To see links please register here]

public void ConfigureServices(IServiceCollection services)
{
}

public void Configure(IApplicationBuilder app)
{
app.MapSignalR();



}
}
}
Took me a while to notice that Configure was supposed to be Configuration and IApplicationBuilder needs to be IAppBuilder. I also pulled off the assembly annotation above the namespace.


I wound up scrapping trying to use Asp.Net 5 couldn't get it to work. Went back to 4.6 and everything worked fine. Followed this walkthrough

[To see links please register here]

I had this same problem. Turns out my .csproj file the first line:

Project ToolsVersion="12.0" didn't match my other files. Changed it to:

Project ToolsVersion="14.0"

and no more compile issue.

Using MVC5, enter your Startup.cs file.

Add `IAppBuilder appBuilder` to `Configure()`:

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory, IAppBuilder appBuilder)
{

Then, under

app.UseMvc(routes =>
{
routes.MapRoute(
name: "default",
template: "{controller=Home}/{action=Index}/{id?}");
});

add `appBuilder.MapSignalR();`

Install Nuget Package: `Microsoft.AspNet.Identity.Owin`

Only install this nuget:

Install-Package Microsoft.AspNet.WebApi.OwinSelfHost