Question

I am currently working on a project with SignalR. On my production server, it is missing an automatically generated js-file in ~/signalr/hubs.
I wanted to try this solution:
SignalR not working on production server

But when I try to add this line to my application_start method in global.asax, my project will not build anymore. Although intellisense knows and suggests the extension method!

I referenced the namespace with using SignalR;. I tried calling it as an extension method and calling it as a static method with the object instance as the first parameter.
The exact error messages:

When calling as extension method:

Error   1   'System.Web.Routing.RouteCollection' does not contain a definition for 'MapHubs' and no extension method 'MapHubs' accepting a first argument of type 'System.Web.Routing.RouteCollection' could be found (are you missing a using directive or an assembly reference?)

When calling as static method:

Error   1   The type or namespace name 'RouteExtensions' does not exist in the namespace 'SignalR' (are you missing an assembly reference?) 

Anybody knows why this happens and how to solve the problem? Many thanks in advance!

Answer 1

I’m pretty sure that it could be one of these reasons:

• Your project requires a reference to an assembly that’s not added to the project.
• Is your project using the .NET Framework version that’s compatible with the referenced assembly?

With your given info, it would be hard to determine the exact reason, but I believe that I provided you some helpful hints.

The fact that intellisense suggests you anything like an extension method won’t mean that the project has the required references to work properly.