.Net Core SignalR cannot add or use in startup

Question

Ive recently come back to an old .Net Core application which was using SignalR.

I think at the time the only SignalR NuGet package available for .Net Core applications was a preview. And it worked.

Im now on a new machine and dont know what the preview feed was for this package so ive uninstalled it and installed this:

> Install-Package Microsoft.AspNet.SignalR.Core -Version 2.4.1

Everything seems fine with a few namespace changes apart from these two errors in the Startup.cs file.

Error CS1061 'IServiceCollection' does not contain a definition for 'AddSignalR' and no accessible extension method 'AddSignalR' accepting a first argument of type 'IServiceCollection' could be found (are you missing a using directive or an assembly reference?)

Error CS1061 'IApplicationBuilder' does not contain a definition for 'UseSignalR' and no accessible extension method 'UseSignalR' accepting a first argument of type 'IApplicationBuilder' could be found (are you missing a using directive or an assembly reference?)

I've looked around and there isn't much available for me, other than someone suggesting you need to install Microsoft.AspNetCore.SignalR.Http which I cant find. Someone else suggested you need to install this:

Install-Package Microsoft.AspNetCore.SignalR.Client -Version 1.1.0

Which I've tried, but the errors remain, how do I get these to go away?

Answer 1

I solved the issue by replacing the code from

app.UseSignalR(routes =>
        {
            routes.MapHub<NotifyHub>("notify"); 
        });

to

app.UseEndpoints(endpoints =>
        {
            endpoints.MapHub<NotifyHub>("/notify");
        });

I am using Dot net 5.0