C# File Download

FileDownload.cs

public class FileDownload {
 private volatile bool _completed;

 public void DownloadFile(string address, string location) {

  using(WebClient client = new WebClient()) {
   Uri Uri = new Uri(address);
   _completed = false;

   client.DownloadFileCompleted += new System.ComponentModel.AsyncCompletedEventHandler(Completed);

   client.DownloadProgressChanged += new DownloadProgressChangedEventHandler(DownloadProgress);
   client.DownloadFileAsync(Uri, location);
  }
 }

 public bool DownloadCompleted {
  get {
   return _completed;
  }
 }

 private void DownloadProgress(object sender, DownloadProgressChangedEventArgs e) {
  // Displays the operation identifier, and the transfer progress.
  Console.WriteLine("{0}    downloaded {1} of {2} bytes. {3} % complete...",
   (string) e.UserState,
   e.BytesReceived,
   e.TotalBytesToReceive,
   e.ProgressPercentage);
 }

 private void Completed(object sender, System.ComponentModel.AsyncCompletedEventArgs e) {
  if (e.Cancelled == true) {
   Console.WriteLine("Download has been canceled.");
   _completed = false;
  } else if (e.Error != null) {
   Console.WriteLine("Download error!");
   _completed = false;
  } else {
   Console.WriteLine("Download completed!");
   _completed = true;
  }
 }
}

// override DownloadFileAsync timeout to 10 second
public class WebClientWithTimeout: WebClient {
 //10 secs default
 public int Timeout {
  get;
  set;
 } = 10000;

 //for sync requests
 protected override WebRequest GetWebRequest(Uri uri) {
  var w = base.GetWebRequest(uri);
  w.Timeout = Timeout; //10 seconds timeout
  return w;
 }

 //the above will not work for async requests :(
 //let's create a workaround by hiding the method
 //and creating our own version of DownloadStringTaskAsync
 public new async Task < string > DownloadStringTaskAsync(Uri address) {
  var t = base.DownloadStringTaskAsync(address);
  if (await Task.WhenAny(t, Task.Delay(Timeout)).ConfigureAwait(false) != t) //time out!
  {
   CancelAsync();
  }
  return await t.ConfigureAwait(false);
 }
}

READ.md

using

FileDownload Down = new FileDownload();
Down.DownloadFile(pathURL, pathSave);