UseSignalR and UseConnections are marked obsolete

[BrennanConroy]

The methods UseConnections and UseSignalR, and the classes ConnectionsRouteBuilder and HubRouteBuilder are being marked obsolete in 3.0. And will be removed in the next major release after that.

The preferred method for using SignalR starting in 3.0 is to use Endpoint Routing. See example below.

Old code:

app.UseSignalR(routes =>
{
    routes.MapHub<SomeHub>("/path");
});

New code:

app.UseEndpoints(endpoints =>
{
    endpoints.MapHub<SomeHub>("/path");
});

See dotnet/aspnetcore#10754 for discussion.

This announcement has been migrated to dotnet/docs#14928