I wrote a JSONHelper extension

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Newtonsoft.Json;
using Newtonsoft.Json.Converters;
using Newtonsoft.Json.Serialization;

namespace CapMon.Utilities
{
    public static class JsonHelper
    {
        private static JsonSerializerSettings _jsonSettings;

        static JsonHelper()
        {
            IsoDateTimeConverter datetimeConverter = new IsoDateTimeConverter();
            datetimeConverter.DateTimeFormat = "yyyy-MM-dd HH:mm:ss";

            _jsonSettings = new JsonSerializerSettings();
            _jsonSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
            _jsonSettings.MissingMemberHandling = Newtonsoft.Json.MissingMemberHandling.Ignore;
            _jsonSettings.NullValueHandling = Newtonsoft.Json.NullValueHandling.Ignore;
            _jsonSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore;
            _jsonSettings.Converters.Add(datetimeConverter);
        }

        public static string ToJson(this object obj)
        {
            try
            {
                if (null == obj)
                    return null;

                return JsonConvert.SerializeObject(obj, Formatting.None, _jsonSettings);
            }
            catch (Exception ex)
            {
                Logging.LogExeption(ex);

                return null;
            }
        }

        public static T FromJson<T>(this string json)
        {
            try
            {
                return JsonConvert.DeserializeObject<T>(json, _jsonSettings);
            }
            catch (Exception ex)
            {
                Logging.LogExeption(ex);

                return default(T);
            }
        }
    }
}