How can I connect on my own PC to a local FileZilla FTP server for testings?

I downloaded the FileZilla Server and installed it.

Then I use in FileZilla as address: 127.0.0.1 port: 14147 and admin user name: admin

And it connected fine.

But now I want to connect to the server upload download and delete files using C#.

This is my code. This code was working fine when I used my online FTP server at ipage.com

But now I want to use it with the FileZilla.

string fff = "";
public string[] GetFileList()
{
    string[] downloadFiles;
    StringBuilder result = new StringBuilder();
    WebResponse response = null;
    StreamReader reader = null;
    try
    {
        FtpWebRequest reqFTP;
        reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + f.Host + "/"));
        fff = "ftp://" + f.Host + "/";
        reqFTP.UseBinary = true;
        reqFTP.Credentials = new NetworkCredential(f.Username, f.Password);
        reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;
        reqFTP.Proxy = null;
        reqFTP.KeepAlive = false;
        reqFTP.UsePassive = false;
        response = reqFTP.GetResponse();
        reader = new StreamReader(response.GetResponseStream());
        string line = reader.ReadLine();
        while (line != null)
        {
            result.Append(line);
            result.Append("\n");
            line = reader.ReadLine();
        }
        result.Remove(result.ToString().LastIndexOf('\n'), 1);
        return result.ToString().Split('\n');
    }
    catch (Exception ex)
    {
        if (reader != null)
        {
            reader.Close();
        }
        if (response != null)
        {
            response.Close();
        }
        downloadFiles = null;
        return downloadFiles;
    }
}

In fff I see ftp://127.0.0.1/ and f.Username is empty "" and f.Password is admin

Then I make continue and I'm getting exception:

The remote server returned an error: (501) Syntax error in parameters or arguments

System.Net.WebException was caught
  HResult=-2146233079
  Message=The remote server returned an error: (501) Syntax error in parameters or arguments.
  Source=System
  StackTrace:
       at System.Net.FtpWebRequest.CheckError()
       at System.Net.FtpWebRequest.SyncRequestCallback(Object obj)
       at System.IO.Stream.Close()
       at System.Net.ConnectionPool.Destroy(PooledStream pooledStream)
       at System.Net.ConnectionPool.PutConnection(PooledStream pooledStream, Object owningObject, Int32 creationTimeout, Boolean canReuse)
       at System.Net.FtpWebRequest.FinishRequestStage(RequestStage stage)
       at System.Net.FtpWebRequest.GetResponse()
       at FTP_ProgressBar.FtpProgress.GetFileList() in c:\ftp_progressbar\FTP_ProgressBar\FtpProgress.cs:line 342
  InnerException:

Line 342 is:

response = reqFTP.GetResponse();

What I want is to demo FTP server so I can check my C# program on it.