我想通过c# 将电脑里已有的txt的ansi的编码的文件 转为txt的utf-8的文件 但是一到中文转出来的就都是乱码？那位大侠帮帮忙

Question

class FileControl
    {
        private string path = "";
        private DirectoryInfo dirInfo = null;
        private FileInfo[] fileInfo = null;
        private string msg = "";        public string Msg
        {
            get { return msg; }
            set { msg = value; }
        }        public string Path        {
            get { return path; }
            set { path = value; }
        }        public FileControl()
        { 
            
        }
        public FileControl(string path)
        {
            this.dirInfo = new DirectoryInfo(path);
        }        public void  getDirInfo(string path)
        {
            this.dirInfo = new DirectoryInfo(path);           
        }
        private void getFileInfoArr()
        {
            if (this.dirInfo != null)
            {
                this.fileInfo = this.dirInfo.GetFiles("*.txt", SearchOption.AllDirectories);
            }
            else
            {
                this.msg = "无可转换的txt文件";
            }
        }        public  void Transform()
        {            try
            {
                this.getFileInfoArr();
                foreach (FileInfo fi in this.fileInfo)
                {
                    FileStream fs = new FileStream(fi.FullName, FileMode.Open, FileAccess.Read);
                    StreamReader streamReader = new StreamReader(fs);
                    string newFileName = fi.FullName.Split('.')[fi.FullName.Split('.').Length - 2] + "_.txt";
                    File.WriteAllText(newFileName, streamReader.ReadToEnd(), Encoding.UTF8);
                }
                this.msg = "转换完美完成！";
            }
            catch (Exception ex)
            {
                this.msg = "转换发生异常！异常原因："+ex.Message;
            }
        }    }这是我写的一个转换的类   Transform就是转换的方法

Answer 1

        static string Utf_To_Ansi(string UtfString) 
        { 
            //把原来的转换为byte数组，而且是utf_8编码的 
            Byte[] change = System.Text.Encoding.UTF8.GetBytes(UtfString.ToCharArray()); 
            //用convet直接转换 
            Byte[]changde= Encoding.Convert(System.Text.Encoding.UTF8, System.Text.Encoding.ASCII, change); 
            return change.ToString();         }