This event is raised each time an asynchronous operation to download a resource as a string completes. These operations are started by calling the erload:System.Net.WebClient.DownloadStringAsync methods.
The System.Net.DownloadStringCompletedEventHandler is the delegate for this event. The System.Net.DownloadStringCompletedEventArgs class provides the event handler with event data.
For more information about handling events, see Consuming Events.