.NET Core：SignalR

　　In the Startup method ConfigureServices configuration:
services.AddSignalR ();

　　Cross-domain settings need to change settings:
services.AddCors (Options =>
　　options.AddPolicy (AppConfig.DefaultCorsPolicyName, Builder =>
　　{
　　　　.. Builder.AllowAnyOrigin () AllowAnyMethod () AllowAnyHeader () AllowCredentials () WithOrigins (AppConfig.Origins.. .toArray ());
　　}));

　　Configure enable process:
app.UseSignalR (routes =>
{
　　routes.MapHub <Chub> ( "/ Hub");
});

　　Need to inherit the Hub:
public class Chub: the Hub
{
}