Download a file with credentials - username and password - in C#

Use the System.Net.WebClient class to download a file with credentials.

See the following example,

WebClient downloadWC = new WebClient();
downloadWC.Credentials = new System.Net.NetworkCredential("egg", "kiosk");
byte[] buff = downloadWC.DownloadData("http://www.downloads.com/files/file.txt");

using (System.IO.FileStream fs = new FileStream(@"X:\downloads\file.txt", FileMode.Create))
{
      fs.Write(buff, 0, buff.Length);
      fs.Close();
}