FTP Download on C#

Question

I am trying to download files from Raspberry Pi with ftp protocol. I have to press a button to download a file Press the button and access to 'C:\Users\Monster\Desktop\ftp' is denied.' I'm getting an error. I installed the app manifest, added the necessary permission line for admin, right clicked on the folder I want to download and checked the permissions in the security section, all permissions are open. I couldn't find the reason for the error I got, can you help me, I wish you a good day.

 int bufferSize = 2048;
        FtpWebRequest ftpRequest = (FtpWebRequest)FtpWebRequest.Create("ftp://10.252.26.72//media/pi/Video1/video.mp4");
        ftpRequest.Credentials = new NetworkCredential("pi", "1");
        ftpRequest.Method = WebRequestMethods.Ftp.DownloadFile;
        ftpRequest.UseBinary = true;
        ftpRequest.UsePassive = true;
        ftpRequest.KeepAlive = true;
        ftpRequest.Method = WebRequestMethods.Ftp.DownloadFile;
        FtpWebResponse ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
        Stream ftpStream = ftpResponse.GetResponseStream();
        FileStream localFileStream = new FileStream(@"C:\Users\Monster\Desktop\ftp", FileMode.Create);
        byte[] byteBuffer = new byte[bufferSize];
        int bytesRead = ftpStream.Read(byteBuffer, 0, bufferSize);
        try
        {
            while (bytesRead > 0)
            {
                localFileStream.Write(byteBuffer, 0, bytesRead);
                bytesRead = ftpStream.Read(byteBuffer, 0, bufferSize);
            }
        }
        catch (Exception ex)
        {
        }

Answer 1

Most likely this is because you are not disposing the file stream with using. You should also set the FileAccess mode.

Also the loop is unnecessary, you can just use CopyTo.

FtpWebRequest ftpRequest = (FtpWebRequest)WebRequest.Create("ftp://10.252.26.72//media/pi/Video1/video.mp4")
ftpRequest.Credentials = new NetworkCredential("pi", "1");
ftpRequest.Method = WebRequestMethods.Ftp.DownloadFile;
ftpRequest.UseBinary = true;
ftpRequest.UsePassive = true;
ftpRequest.KeepAlive = true;
ftpRequest.Method = WebRequestMethods.Ftp.DownloadFile;

using (FtpWebResponse ftpResponse = (FtpWebResponse)ftpRequest.GetResponse())
using (Stream ftpStream = ftpResponse.GetResponseStream())
using (FileStream localFileStream = new FileStream(@"C:\Users\Monster\Desktop\ftp", FileMode.Create, FileAccess.Write, FileShare.None))
{
    ftpStream.CopyTo(localFileStream);
}