转换源文件编码（博客处女作）

本人工作环境为繁体，今天从园子里找了一些SourceCode，结果中文注释在VS里全变成了乱码，源文件又比较多，就写了一个小工具，顺便学习一下编码的转换。
功能：把给定目录里面的cs文件全部由gb2312转换成unicoe，并备份源文件。
考虑可能不是很周到，两个知识点：编码转换和目录遍历

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;

namespace ConvertEndcode
{
    /**//// <summary>        
    /// Author: Kymo Wang
    /// Date: 2008/04/21
    /// Description: Convert file from source encoding to destination encoding
    /// </summary>
    
    public class ConvertEncoder
    {
        private Encoding encFrom = Encoding.GetEncoding("GB2312");
        private Encoding encTo = Encoding.Unicode;
        private string filePath;

        public ConvertEncoder(string filePath)
        {
            this.filePath = filePath;
            Convert();
        }

        private void Convert()
        {
            StreamReader sr = null;
            StreamWriter sw = null;
            try
            {
                //Backup the original file
                if (File.Exists(filePath + ".bak"))
                {
                    Console.WriteLine("File {0} already exists!", filePath + ".bak");
                    return;
                }
                    
                File.Copy(filePath, filePath + ".bak");

                //Read file
                sr = new StreamReader(filePath, encFrom);
                string strContent = sr.ReadToEnd();
                sr.Close();
                byte[] byteSource = encFrom.GetBytes(strContent);

                //Convert source content to Unicode
                byte[] byteDest = Encoding.Convert(encFrom, encTo, byteSource);
                char[] charDest = encTo.GetChars(byteDest);
                strContent = new string(charDest);

                //Write content with Unicode
                File.Delete(filePath);
                FileStream stream = new FileStream(filePath, FileMode.OpenOrCreate);
                sw = new StreamWriter(stream, encTo);
                sw.Write(strContent);
                Console.WriteLine("Converting file: {0}", filePath);
            }
            catch
            {
                throw;
            }
            finally
            {
                if (sr != null)
                {
                    sr.Close();
                }
                if (sw != null)
                {
                    sw.Close();
                }
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;

namespace ConvertEndcode
{
    
    class Program
    {
        static void Main(string[] args)
        {
            if (args.Length < 1)
            {
                Console.WriteLine("Please input directory!");
                return;
            }
            new Program().TraverseDir(args[0]);
        }

        //Traverse direcotry
        private void TraverseDir(string dir)
        {
            if (!Directory.Exists(dir))
            {
                Console.WriteLine("Dir [{0}] not exists!", dir);
                return;
            }
            string[] fileList = Directory.GetFiles(dir);
            foreach (string fileName in fileList)
            {
                if (fileName.EndsWith(".cs", StringComparison.CurrentCulture))
                {
                    ConvertEncoder convert = new ConvertEncoder(fileName);
                }
            }
            string[] dirList = Directory.GetDirectories(dir);
            foreach (string dirName in dirList)
            {
                TraverseDir(dirName);
            }
        }
            
    }
}