把下载的CSS文件改为可读的形式

using System.IO;


        private void button1_Click(object sender, EventArgs e)
        {
            //get path
            OpenFileDialog op = new OpenFileDialog();
            op.RestoreDirectory = true;
            op.Filter = "All|*.*|xlsx|*.xlsx";
            if (op.ShowDialog() != DialogResult.OK)
                return;

            textBox1.Text = op.FileName;
        }

        private void button2_Click(object sender, EventArgs e)
        {
　　　　　　　　　　

                string text = File.ReadAllText(textBox1.Text);
                //text = text.Replace("{", "\r\n {");

                text = text.Replace("{", "\r\n {");
                text = text.Replace("}", "} \r\n");


                File.WriteAllText("test.txt", text);

        }