How to Consume SignalR in Windows 10 IoT Core Insider Preview : Step 2

MainViewModel.cs

using Microsoft.AspNet.SignalR.Client;
using PropertyChanged;
using System;
using Windows.UI.Core;
namespace SignalRPiExample
{
    [ImplementPropertyChanged]
    internal class MainViewModel
    {
        private readonly CoreDispatcher _dispatcher;

        public MainViewModel()
        {
            _dispatcher = CoreWindow.GetForCurrentThread().Dispatcher;

            var connection = new HubConnection("http://internetuptime.azurewebsites.net/signalr");

            var hubProxy = connection.CreateHubProxy("UptimeHub");
            hubProxy.On<string>("internetUpTime", UpdateTime);

            connection.Start();
        }

        public string Uptime { get; set; }

        private async void UpdateTime(string s)
        {
            await _dispatcher.RunAsync(CoreDispatcherPriority.Normal, () => Uptime = s);
        }
    }

}