Xamarin SignalR Connectivity with ASP.NET Core SignalR Hub

Question

In Xamrin SignalR show connection status "disconnected".

 

protected override async void OnAppearing()
        {
            base.OnAppearing();

            connection = new HubConnectionBuilder()
                .WithUrl("http://localhost:26523/chat")
                .Build();

            connection.On<string, string>("Send", (name, message) =>
            {
                SignalRResult.Text = name + " - " + message;
            });

            if (connection.State == HubConnectionState.Disconnected)
            {
                try
                {
                    await connection.StartAsync();  // Not working
                }
                catch (Exception ex)
                {
                    //messagesList.Items.Add(ex.Message);
                }
            }

        }

 I'm running the SignalR Hub in my local IIS. Web client working fine, Xamrin client not establishing connection.