Gets a readable stream that contains data downloaded by a erload:System.Net.WebClient.DownloadDataAsync method.
Documentation for this section has not yet been entered.
You should check the System.ComponentModel.AsyncCompletedEventArgs.Error and System.ComponentModel.AsyncCompletedEventArgs.Cancelled properties before using the data that is returned by this property. If the System.ComponentModel.AsyncCompletedEventArgs.Error property's value is an Exception object or the System.ComponentModel.AsyncCompletedEventArgs.Cancelled property's value is true, the asynchronous operation did not complete correctly and the OpenReadCompletedEventArgs.Result property's value will not be valid.