强制XmlSerializer将DateTime序列化为'YYYY-MM-DD hh:mm:ss'

using System;
using System.Xml.Serialization;

public class CustomDateTimeSerializer : IXmlSerializable
{
    private DateTime dateTime;

    public CustomDateTimeSerializer()
    {
    }

    public CustomDateTimeSerializer(DateTime dateTime)
    {
        this.dateTime = dateTime;
    }

    public void WriteXml(System.Xml.XmlWriter writer)
    {
        writer.WriteString(dateTime.ToString("yyyy-MM-dd HH:mm:ss"));
    }

    public void ReadXml(System.Xml.XmlReader reader)
    {
        dateTime = DateTime.Parse(reader.ReadString());
    }

    public System.Xml.Schema.XmlSchema GetSchema()
    {
        return null;
    }
}

public class MyClass
{
    public CustomDateTimeSerializer CustomDateTime { get; set; }
}

public class Program
{
    public static void Main()
    {
        MyClass myObject = new MyClass();
        myObject.CustomDateTime = new CustomDateTimeSerializer(DateTime.Now);

        XmlSerializer serializer = new XmlSerializer(typeof(MyClass));
        using (System.IO.StringWriter writer = new System.IO.StringWriter())
        {
            serializer.Serialize(writer, myObject);
            string xml = writer.ToString();
            Console.WriteLine(xml);
        }
    }
}