multithreading program with webrequests c#

Question

I want to make multithreading asynchronous download manager. But i have problems with multithreading. One thread correctly works, but when I create second thread - works nothing. I assume that a problem with synchronism of webrequest. I read this answer Multithreading a large number of web requests in c#, but I didn't understand completely. Now question: How can I modify a code to use a multithreading(Thread, Threadpool).

class DownloadableContent:

{
    private string url { get; set; }
    private string path { get; set; }
    private Stream streamResponse { get; set; }
    private Stream streamLocal { get; set; }
    private HttpWebRequest webRequest { get; set; }
    private HttpWebResponse webResponse { get; set; }

    public DownloadableContent(string url, string path)
    {
        this.url = url;
        this.path = path;
    }

    public void Download()
    {
        using (WebClient wcDownload = new WebClient())
        {
            try
            {
                webRequest = (HttpWebRequest)WebRequest.Create(url);                 
                webRequest.Credentials = CredentialCache.DefaultCredentials;
                webResponse = (HttpWebResponse)webRequest.GetResponse();
                Int64 fileSize = webResponse.ContentLength;
                streamResponse = wcDownload.OpenRead(url);
                streamLocal = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.None);
                byte[] downBuffer = new byte[2048];     
                int bytesSize = 0;
                while ((bytesSize = streamResponse.Read(downBuffer, 0, downBuffer.Length)) > 0)
                {
                    streamLocal.Write(downBuffer, 0, bytesSize);
                }
            }
            finally
            {
                streamResponse.Close();
                streamLocal.Close();
            }
        }
    }       
}

And class main:

DownloadableContent file = new DownloadableContent("url", @"path");  
Thread thread = new Thread(file.Download);
thread.Start();

Answer 1

It is worth for you to read Async programming then take a look at this http://msdn.microsoft.com/en-us/library/System.Net.WebClient_methods(v=vs.110).aspx You have method to download thing asynchronously. Also take a look at TPL and avoid threads http://msdn.microsoft.com/en-us/library/dd460717(v=vs.110).aspx

Probably reading a little more will help you avoid lots of headaches.

This is an easy example

private static void Main(string[] args)
{
    var urlsAndPaths = new Dictionary<string, string>();
    urlsAndPaths.Add("http://i.forbesimg.com/media/lists/people/lionel-messi_416x416.jpg","messi.jpg");
    urlsAndPaths.Add("http://sizzlingsuperstars.com/wp-content/uploads/2014/07/Cristiano-Ronaldo-2-480x309.jpg", "cristiano.jpg");            
    foreach (var kvp in urlsAndPaths)
    {
        var wc = new WebClient();
        wc.DownloadFileAsync(new Uri(kvp.Key),kvp.Value);
    }
    Console.ReadKey();
}