Adding services to startup.cs

Hi,

Is it possible to inject a service to startup.cs without manually adding it inside of Visual Studio?
I am trying to add SignalR to the project, but I need to inject it’s service!

Kind Regards,
Alex

[EDIT]: In case I have to add it directly in visual studio, will that have a negative effect on generating the project withing asp.net maker editor?

If you modify the generated startup.cs, make sure that you do not regenerate that file or it will be overwritten.