C#的中文编码问题，求解诶
这是数据写入TXT的
 private void button1_Click(object sender, EventArgs e)
        {
            if (!File.Exists(path))
            {
                FileStream fs1 = new FileStream(path, FileMode.Create, FileAccess.Write); //创建文件 
                StreamWriter sw = new StreamWriter(fs1,System.Text.Encoding.Default);
                sw.WriteLine(textBox1.Text.Trim() + "\t" + textBox2.Text.Trim());   //写入值
                sw.Close();
                fs1.Close();
            }
            else
            {
                StreamWriter sr = File.AppendText(path);
                sr.WriteLine(textBox1.Text.Trim() + "\t" + textBox2.Text.Trim()); //写入值
                sr.Close();
            }
            readini(path);
        }
这是读出的
 public void readini(string url)
        {
            DataTable dt = new DataTable();
            dt.Columns.Add("名称", typeof(String));
            dt.Columns.Add("指令", typeof(String));
            using (StreamReader reader = new StreamReader(url,System.Text .Encoding.Default))
            {
                while (!reader.EndOfStream)
                {
                    
                    string[] data = reader.ReadLine().Replace("\t", "\t").Split('\t');
                    DataRow dr = dt.NewRow();
                    dr[0] = data[0];
                    dr[1] = data[1];
 &nbs