private async Task Loader() { _lightsMainNode.Nodes.Clear(); DeviceLocator.UseAllAvailableMulticastAddresses = _settings.AppSettings.MulticastLookup; var devices = await DeviceLocator.DiscoverAsync(); foreach (Device device in devices.OrderBy(m => m.Name)) { Guid pageGuid = Guid.NewGuid(); Aside.Invoke((MethodInvoker) delegate() { Aside.CreateChildNode(_lightsMainNode, AddPage(new LightPage( new DeviceViewModel { Device = device, Hostname = device.Hostname, Name = device.Name, IsOn = device.Properties.FirstOrDefault(m => m.Key == "power").Value.ToString(), PageGuid = pageGuid }), pageGuid)); }); } Aside.Invoke((MethodInvoker) delegate() { Aside.SelectFirst(); }); _lightsMainNode.Expand(); }