################# SERWER ###############

    public class NotificationHub : Hub
    {
        private static IHubContext hubContext = GlobalHost.ConnectionManager.GetHubContext<NotificationHub>();

        public void Hello()
        {
            Clients.All.hello();
        }

        public static void SayHello()
        {
            hubContext.Clients.All.hello();
        }
    }


    public partial class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            ConfigureAuth(app);
            app.MapSignalR();
        }
    }

    [AllowAnonymous]
    [RoutePrefix("api/values")]
    public class ValuesController : ApiController
    {
        // GET api/values
        [Route("get")]
        [HttpGet]
        public IEnumerable<string> Get()
        {
            NotificationHub.SayHello();
            return new string[] { "value1", "value2" };
        }
    }

   ################# KLIENT ###############

export class ChatComponent implements OnInit {

  private connection: any;
  private proxy: any;
  private url: 'http://localhost:51287/api/values/get/signalr';

  constructor() { }

  public startConnection(): void {
    this.connection = $.hubConnection(this.url, { useDefaultPath: false });
    this.proxy = this.connection.createHubProxy('ProcessingHub');

    this.connection.start().done((data: any) => {
      console.log('Connected to Processing Hub');
      this.sendMessage();
    }).catch((error: any) => {
      console.log('Hub error -> ' + error);
    });
  }

  public sendMessage(): void {
    this.proxy.invoke('SendMessage', 'test')
      .catch((error: any) => {
        console.log('SendMessage error -> ' + error);
      });
  }

  ngOnInit(): void {
    this.startConnection();
  }

}