Serializing XML with stylesheet

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Reflection;


namespace WriteXmlWithStyle
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
        }

        private string ApplicationDir
        {
            get
            {
                Assembly assy = Assembly.GetExecutingAssembly();

                FileInfo finfo = new FileInfo(assy.FullName);

                return finfo.Directory.Parent.Parent.FullName;
            }
        }

        private void WriteXmlBtn_Click(object sender, EventArgs e)
        {
            DictionarySerializer serializer = new DictionarySerializer();

            Dictionary dictionary = serializer.CreateTestDictionary();

            // Write the dictionary out to a file without a stylesheet reference
            string xmlFile = Path.Combine(ApplicationDir, "Dictionary.xml");
            File.Delete(xmlFile);

            FileStream stream = File.OpenWrite(xmlFile);
            try
            {
                serializer.Serialize(dictionary, stream, null);
            }
            finally
            {
                stream.Close();
            }

            // Now write the dictionary out with a stylesheet reference
            xmlFile = Path.Combine(ApplicationDir, "DictionaryWithStyle.xml");
            File.Delete(xmlFile);

            stream = File.OpenWrite(xmlFile);
            try
            {
                serializer.Serialize(dictionary, stream, "Dictionary.xslt");
            }
            finally
            {
                stream.Close();
            }
        }
    }
}