Hi I am trying to serialize a hash table but not happening

private void Form1_Load(object sender, EventArgs e)
        {
            Hashtable ht = new Hashtable();        

            DateTime dt = DateTime.Now;
            for (int i = 0; i < 10; i++)
                ht.Add(dt.AddDays(i), i);           
            SerializeToXmlAsFile(typeof(Hashtable), ht);
        }

private void SerializeToXmlAsFile(Type targetType, Object targetObject)
        {
            try
            {
                string fileName = @"C:\testtttttt.xml";
                //Serialize to XML
                XmlSerializer s = new XmlSerializer(targetType);
                TextWriter w = new StreamWriter(fileName);
                s.Serialize(w, targetObject);
                w.Flush();
                w.Close();
            }
            catch (Exception ex) { throw ex; }
        }

After a google search , I found that objects that impelment IDictonary cannot be serialized. However, I got success with binary serialization.

But I want to have xml one. Is there any way of doing so?

I am using C#3.0

Thanks