批量替换文件夹里面的文本文件的指定字符

        ///<summary>
/// 初始化加载
///</summary>
        public static void Update()
        {
            //文件夹路径
            string path = @"D:\408";
            //获取文件夹
            DirectoryInfo dir = new DirectoryInfo(path);
            GetFileInfo(path, dir);

        }
        ///<summary>
/// 遍历文件夹下面的子文件
///</summary>
///<param name="pathFile">文件夹路径</param>
///<param name="dir">文件夹名</param>
        private static void GetFileInfo(string pathFile, DirectoryInfo dir)
        {

            //获取文件夹下面的子文件
            FileInfo[] dirInfo = dir.GetFiles();
            DataTable dt = new DataTable();
            //遍历子文件
            foreach (FileInfo info in dirInfo)
            {
                //子文件名称
                string filename = info.Name.ToString();
                Console.WriteLine(filename);
                htm(@"D:\408\" + filename);

            }


        }
        ///<summary>
/// 替换文件
///</summary>
///<param name="path">文本文件路径</param>
        public static void  htm(string path)
        {
            string html = "";
            using (Stream stream = new FileStream(path, FileMode.Open, FileAccess.Read))
            {
                using (StreamReader reader = new StreamReader(stream))
                {
                    html = reader.ReadToEnd().Trim();
                    html = html.Replace("Ｄ", "D").Replace("Ｂ", "B").Replace("Ａ", "A").Replace("Ｃ", "C");
                  
                    
                }
            }
            DataInit(html, path);
        }
        ///<summary>
/// 保存问题换过的文本文件
///</summary>
///<param name="html">替换过的文件内容</param>
///<param name="path">保存路径</param>
        public static void DataInit(string html, string path)
        {

            using (Stream stream = new FileStream(path, FileMode.Create, FileAccess.Write))
            {
                using (StreamWriter writer = new StreamWriter(stream))
                {
                    writer.Write(html);
                }
            }
        }