using System;

using System.Text;

using System.Collections;

public class Program

{

    public static void Main()

    {

        var baseDateTimeOffset = new DateTimeOffset(2020, 1, 1, 0, 0, 0, TimeSpan.Zero);

        var baseDateTime = new DateTime(2020, 1, 1, 0, 0, 0);

        var serializer = new Quartz.Simpl.JsonObjectSerializer();

        serializer.Initialize();

        Console.WriteLine("DateTimeOffset PARSED from DateTime: \n\t" 

                          + DateTimeOffset.Parse(baseDateTime.ToString()));

        var dateTimeOffsetFromDateTime = (DateTimeOffset)baseDateTime;

        //var dateTimeFromDateTimeOffset = (DateTime)DateTimeOffset.Now; //doesn't work

        Console.WriteLine("\nDateTimeOffset CASTED from DateTime: \n\t" 

                          + DateTimeOffset.Parse(dateTimeOffsetFromDateTime.ToString()));

        var yum = new Quartz.Util.StringKeyDirtyFlagMap();

        yum.Put("DateTime", baseDateTime);

        yum.Put("DateTimeOffset", baseDateTimeOffset);

        var serializedBytes = serializer.Serialize(yum);

        string jsonString = string.Empty;

        using (var reader = new System.IO.StringReader(Encoding.UTF8.GetString(serializedBytes)))

        {

            jsonString = reader.ReadToEnd();

            Console.WriteLine("\nSerialized JSON: \n\t" + jsonString);

        }

​

        var deserializedJsonObject = serializer.DeSerialize<IDictionary>(serializedBytes);

        Console.WriteLine("\nDeserialized Object:" 

                          + "\n\t\tDateTime:       " + deserializedJsonObject["DateTime"] + " -> Type: " + deserializedJsonObject["DateTime"].GetType().Name

                          + "\n\t\tDateTimeOffset: " + deserializedJsonObject["DateTimeOffset"] + " -> Type: " + deserializedJsonObject["DateTimeOffset"].GetType().Name);

    }

}