BSON default DateTime serialization / deserialization behavior

BsonTest.cs

using System;
using System.Diagnostics;
using System.IO;
using Newtonsoft.Json;
using Newtonsoft.Json.Bson;

namespace bsontest
{
    class Program
    {
        static void Main(string[] args)
        {
            var d1 = new DateTime(2013, 5, 21, 23, 30, 0, 250, DateTimeKind.Unspecified).AddTicks(1);
            var d2 = new DateTime(2013, 5, 21, 23, 30, 0, 250, DateTimeKind.Utc).AddTicks(1);
            var d3 = new DateTime(2013, 5, 21, 23, 30, 0, 250, DateTimeKind.Local).AddTicks(1);

            foreach (var dt in new[] { d1, d2, d3 })
            {
                var ms = new MemoryStream();

                var orig = new Tuple<DateTime>(dt);

                var serializer = JsonSerializer.Create(new JsonSerializerSettings());

                var writer = new BsonWriter(ms);
                var reader = new BsonReader(ms);

                Debug.Assert(writer.DateTimeKindHandling == reader.DateTimeKindHandling);

                serializer.Serialize(writer, orig);

                ms.Position = 0;

                var deserialized = (Tuple<DateTime>)serializer.Deserialize(reader, typeof(Tuple<DateTime>));

                Console.WriteLine(
                    "Original:     {0:yyyy-MM-dd HH:mm:ss.ffff} / {1} ({2})",
                    orig.Item1,
                    orig.Item1.Ticks,
                    orig.Item1.Kind);

                Console.WriteLine(
                    "Deserialized: {0:yyyy-MM-dd HH:mm:ss.ffff} / {1} ({2})", 
                    deserialized.Item1,
                    deserialized.Item1.Ticks,
                    deserialized.Item1.Kind
                );

                Console.WriteLine();

                Debug.Assert(orig.Item1 == deserialized.Item1);
                Debug.Assert(orig.Item1.Kind == deserialized.Item1.Kind);
            }
        }
    }
}

Output.txt

Original:     2013-05-21 23:30:00.2500 / 635047758002500001 (Unspecified)
Deserialized: 2013-05-21 23:30:00.2500 / 635047758002500000 (Local)

Original:     2013-05-21 23:30:00.2500 / 635047758002500001 (Utc)
Deserialized: 2013-05-22 01:30:00.2500 / 635047830002500000 (Local)

Original:     2013-05-21 23:30:00.2500 / 635047758002500001 (Local)
Deserialized: 2013-05-21 23:30:00.2500 / 635047758002500000 (Local)