How to add timezone offset to JSON.NET serialization?

Question

My DateTimePicker is bound to property:

    picker.DataBindings.Add("Value", this, "EventDate");
    ...
    private DateTime eventDate;
    public DateTime EventDate
    {
        get
        {
            var offset = TimeZoneInfo.Local.GetUtcOffset(eventDate);
            string json = JsonConvert.SerializeObject(eventDate, Formatting.Indented);
            Console.WriteLine("get: {0} --- {1}", json, offset);
            return eventDate;
        }
        set
        {
            var offset = TimeZoneInfo.Local.GetUtcOffset(value);
            string json = JsonConvert.SerializeObject(value, Formatting.Indented);
            Console.WriteLine("set: {0} --- {1}", json, offset);
            eventDate = value;
        }
    }

Whenever data binding is to set the property, I've got the following result:

set: "2015-08-03T16:06:59" --- 04:00:00
get: "2015-08-03T16:06:59" --- 04:00:00

The code in get/set only for debug purposes. The whole class is serialized along with EventDate property.

How can I modify DateTime variable and/or json serializer in order to include timezone offset such as:

"2014-08-03T16:06:59.8708232+04:00"

Strange thing is if I create brand new DateTime object and assign to DateTime.Now without binding, JSON.NET will append timezone offset to it. Can't figure out what is the difference.

Answer 1

I use this.

It works very well.

JsonConvert.SerializeObject(object, new JsonSerializerSettings()
{
    DateFormatHandling = DateFormatHandling.IsoDateFormat,
    DateTimeZoneHandling = DateTimeZoneHandling.Local
});