Demo showing how to export TimeSpan as DateTime in Jayrock

Program.cs

// https://groups.google.com/d/msg/jayrock/ZArN2unguMs/Y-aNUp7eqAQJ

using System;
using Jayrock.Json;
using Jayrock.Json.Conversion;
using Jayrock.Json.Conversion.Converters;

static class Program
{
    static void Main()
    {
        var ecf = JsonConvert.CurrentExportContextFactory;
        JsonConvert.CurrentExportContextFactory = () => 
        {
            var ctx = ecf();
            ctx.Register(new TimeSpanExporter());
            return ctx;
        };
        var json = JsonConvert.ExportToString(TimeSpan.FromDays(23.456));
        Console.WriteLine(json);
    }
}

sealed class TimeSpanExporter : ExporterBase
{
    public TimeSpanExporter() : base(typeof(TimeSpan)) {}

    protected override void ExportValue(ExportContext ctx, object value, JsonWriter writer)
    {
        ctx.Export(DateTime.Now + (TimeSpan) value, writer);
    }
}