Windows Store Apps and Bing Maps / Marker Location JSON (C#)

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Windows.Devices.Geolocation;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Core;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;

using Bing.Maps;
using Windows.UI.Popups;

using System.Xml.Linq;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Json;
using System.Collections.ObjectModel;
using System.Text;
// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234238

namespace WindowsStoreApps
{
    /// <summary>
    /// An empty page that can be used on its own or navigated to within a Frame.
    /// </summary>
    /// 

    public class MyLocation
    {
        public double Lat { get; set; }
        public double Lon { get; set; }
        public string LocationName { get; set; }
    }

    public sealed partial class MainPage : Page
    {

        public MainPage()
        {
            this.InitializeComponent();
            InitializeMap();
        }


        void InitializeMap()
        {

            double lat = 0;
            double lon = 0;

            myMap.Credentials = "INSERT_YOUR_BING_MAP_KEY";
            myMap.ZoomLevel = 17;
            myMap.MapType = MapType.Aerial;
            myMap.Width = 800;
            myMap.Height = 800;
			
			/* [{"Lat":"13.815361","Lon":"100.560822","LocationName":"Central Patpharo"},{"Lat":"13.81433","Lon":"100.560162","LocationName":"MRT Phaholyothin"}] */
            string strJSON = string.Empty;
            strJSON = " [{\"Lat\":\"13.815361\",\"Lon\":\"100.560822\",\"LocationName\":\"Central Patpharo\"},{\"Lat\":\"13.81433\",\"Lon\":\"100.560162\",\"LocationName\":\"MRT Phaholyothin\"}]";


            MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(strJSON));
            ObservableCollection<MyLocation> list = new ObservableCollection<MyLocation>();
            DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(ObservableCollection<MyLocation>));
            list = (ObservableCollection<MyLocation>)serializer.ReadObject(ms);

            foreach (MyLocation loc in list)
            {
                Pushpin pushpin = new Pushpin();
                pushpin.Tapped += new TappedEventHandler(pushpinTapped);
                pushpin.Name = loc.LocationName;
                MapLayer.SetPosition(pushpin, new Location(loc.Lat, loc.Lon));
                myMap.Children.Add(pushpin);

                lat = loc.Lat;
                lon = loc.Lon;
            }

            myMap.Center = new Location(lat, lon);

        }

        private async void pushpinTapped(object sender, TappedRoutedEventArgs e)
        {
            MessageDialog dialog = new MessageDialog(((Pushpin)sender).Name);
            await dialog.ShowAsync();
        }

    }
}