using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Web.Script.Serialization;

public class CustomJsonConverter : JavaScriptConverter
{
    public override IEnumerable<Type> SupportedTypes
    {
        get { return new[] { typeof(DateTime) }; }
    }

    public override IDictionary<string, object> Serialize(object obj, JavaScriptSerializer serializer)
    {
        var result = new Dictionary<string, object>();
        if (obj is DateTime)
        {
            var date = (DateTime)obj;
            result[""] = date.ToString("yyyy-MM-dd HH:mm:ss");
        }
        return result;
    }

    public override object Deserialize(IDictionary<string, object> dictionary, Type type, JavaScriptSerializer serializer)
    {
        throw new NotImplementedException();
    }
}