I have a DownloadManager class that manages multiple DownloadItem objects. Each DownloadItem has events like ProgressChanged and DownloadCompleted. Usually you want to use the same event handler for all download items, so it's a bit annoying to have to set the event handlers over and over again for each DownloadItem.

Thus, I need to decide which pattern to use:

1. Use one DownloadItem as a template and clone it as necessary

       var dm = DownloadManager();
       var di = DownloadItem();
       di.ProgressChanged += new DownloadProgressChangedEventHandler(di_ProgressChanged);
       di.DownloadCompleted += new DownloadProgressChangedEventHandler(di_DownloadCompleted);
       DownloadItem newDi;
       newDi = di.Clone();
       newDi.Uri = "http://google.com";
       dm.Enqueue(newDi);
       newDi = di.Clone();
       newDi.Uri = "http://yahoo.com";
       dm.Enqueue(newDi);
   

2. Set the event handlers on the DownloadManager instead and have it copy the events over to each DownloadItem that is enqeued.

       var dm = DownloadManager();
       dm.ProgressChanged += new DownloadProgressChangedEventHandler(di_ProgressChanged);
       dm.DownloadCompleted += new DownloadProgressChangedEventHandler(di_DownloadCompleted);
       dm.Enqueue(new DownloadItem("http://google.com"));
       dm.Enqueue(new DownloadItem("http://yahoo.com"));
   

3. Or use some kind of factory

       var dm = DownloadManager();
       var dif = DownloadItemFactory();
       dif.ProgressChanged += new DownloadProgressChangedEventHandler(di_ProgressChanged);
       dif.DownloadCompleted += new DownloadProgressChangedEventHandler(di_DownloadCompleted);
       dm.Enqueue(dif.Create("http://google.com"));
       dm.Enqueue(dif.Create("http://yahoo.com"));
   

What would you recommend?