一段Big5繁体转换简体GB2312的程序

using System;
using System.IO;
using System.Text;
using System.Runtime.InteropServices;

//Big5繁体转换简体的程序
public class EncodeTool
{

[DllImport("kernel32.dll", EntryPoint = "LCMapStringA")]
public static extern int LCMapString(int Locale, int dwMapFlags, byte[] lpSrcStr, int cchSrc, byte[] lpDestStr, int cchDest);

const int LCMAP_SIMPLIFIED_CHINESE = 0x02000000;
const int LCMAP_TRADITIONAL_CHINESE = 0x04000000;

public static void Main (String[] args)
{
if (args.Length<1)
{
Console.WriteLine("请指定路径！");
}
String[] files=Directory.GetFiles(args[0]);
if(args.Length==2)
files=Directory.GetFiles(args[0],args[1]);
String dir=args[0]+"\\conv";
if(!Directory.Exists(dir)){
Directory.CreateDirectory(dir);
}
for(int i=0;i<files.Length;i++){
StreamReader sr = new StreamReader(files[i],Encoding.GetEncoding("big5"));
String lines=sr.ReadToEnd();
sr.Close();
lines=ConvertString(lines);
//Console.WriteLine(lines);
StreamWriter sw = new StreamWriter(dir+",false,encoding.getencoding(%22gb2312/]\\"+files[i],false,Encoding.GetEncoding("gb2312"));
sw.WriteLine(lines);
sw.Close();
Console.WriteLine("转换 {0} ok!",files[i]);
}
}

public static String ConvertString(String lines){
Encoding gb2312 = Encoding.GetEncoding(936);
byte[] src=gb2312.GetBytes(lines);
byte[] dest = new byte[src.Length];
LCMapString(0x0804, LCMAP_SIMPLIFIED_CHINESE, src, -1, dest, src.Length);
return gb2312.GetString(dest);
}
}