Download files using the FTP in C#

Updated on August 8, 2015     Kisan Patel

To download files using the File Transfer Protocol (FTP), you need to use the System.Net.FtpWebRequest class.

FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://example.com/bootstrap-theme.css");

request.Credentials = new NetworkCredential("username", "password");
            
using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())
{
    Stream data = response.GetResponseStream();
    string targetPath = @"C:\bootstrap-theme.css";
    //Save file to C drive
    if (File.Exists(targetPath))
        File.Delete(targetPath);
    byte[] byteBuffer = new byte[4096];
    using (FileStream output = new FileStream(targetPath, FileMode.CreateNew))
    {
        int bytesRead = 0;
        do
        {
            bytesRead = data.Read(byteBuffer, 0, byteBuffer.Length);
            if (bytesRead > 0)
            {
                output.Write(byteBuffer, 0, bytesRead);
            }
        }
        while (bytesRead > 0);
    }
}