SignalR sample

Hub.cs

namespace Microsoft.AspNetCore.SignalR
{
    public class Hub : IDisposable
    {
        public Hub();

        public IHubClients Clients { get; set; }
        public HubCallerContext Context { get; set; }
        public IGroupManager Groups { get; set; }

        public void Dispose();
        public virtual Task OnConnectedAsync();
        public virtual Task OnDisconnectedAsync(Exception exception);
        protected virtual void Dispose(bool disposing);
    }
}