C# winxp Folder

 private void button1_Click(object sender, EventArgs e)
        {
            openFileDialog1.Filter = "MKV Container (*. mkv) | *.mkv|MP4 Container (*. mp4) | *.mp4| All Files (*.*)|*.*";
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                hledani = openFileDialog1.FileName;
                Video_Box.Text = hledani;
            }

        }


 using (StreamWriter soubor3 = new StreamWriter(".\\temp\\audio_info.bat"))
                {

                    soubor3.Write(".\\tools\\mkvinfo.exe \"");
                    soubor3.Write(hledani);
                    soubor3.Write("\"");

                }