Workaround for Newtonsoft.Json issue 5 https://github.com/chrisntr/Newtonsoft.Json/issues#issue/5

JsonConvert.cs

GetUtcOffSet - JsonConvert.cs Line 111

   private static TimeSpan GetUtcOffset(DateTime dateTime)
   {
#if SILVERLIGHT
      return TimeZoneInfo.Local.GetUtcOffset(dateTime);
#else
      return TimeZone.CurrentTimeZone.GetUtcOffset(dateTime);
#endif
    }

Replacing with this fixes the issue

   private static TimeSpan GetUtcOffset(DateTime dateTime)
   {
      return TimeZone.CurrentTimeZone.GetUtcOffset(dateTime);
   }