Downloading a file form Visual Studio and change the file name is not working

[Ailincai-Nicolae-Rares]

I am trying to download a file from youtube in Visual Studio but when i want to change the file name, is not working. I Mean the file is not downloaded.
` private Process downlaodMusic(string url, string fileName)
{
Process currentsong = new Process();

        currentsong.StartInfo = new ProcessStartInfo
        {
            FileName = "cmd.exe",
            Arguments = $"/C youtube-dl.exe {url} -output {fileName}",
            UseShellExecute = false,
            RedirectStandardOutput = true,
            CreateNoWindow = true
        };

        currentsong.Start();
        return currentsong;
    }`

[dstftw]

Long options must be written with double dash --output.