[XmlRoot("response")]
public class JPayResponse
{
    public string account { get; set; }
    public string @operator { get; set; }
    public int amount { get; set; }
    [XmlIgnore]
    public DateTime addtime { get; set; }

    [XmlElement("addtime")]
    public string addtime2
    {
        get { return addtime.ToString("yyyy-MM-dd HH:mm:ss"); }
        set { addtime = DateTime.Parse(value); }
    }
}