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copied!<p>That is mostly correct except <code>wc</code> is being disposed twice and <code>GetBalance</code> will always be using <code>wc</code> after it's disposed!</p> <p>Edit: a version with that correction:</p> <pre><code>public class Balance : IDisposable { //Constructor WebClient wc; public Balance() { wc = new WebClient(); //Create event handler for the progress changed and download completed events try { wc.DownloadProgressChanged += new DownloadProgressChangedEventHandler(wc_DownloadProgressChanged); wc.DownloadStringCompleted += new DownloadStringCompletedEventHandler(wc_DownloadStringCompleted); } catch { wc.Dispose(); throw; } } ~Balance() { this.Dispose(false); } //Get the current balance for the user that is logged in. //If the balance returned from the server is NULL display error to the user. //Null could occur if the DB has been stopped or the server is down. public void GetBalance(string sipUsername) { //Remove the underscore ( _ ) from the username, as this is not needed to get the balance. sipUsername = sipUsername.Remove(0, 1); string strURL = string.Format("https://www.xxxxxxx.com", sipUsername); //Download only when the webclient is not busy. if (!wc.IsBusy) { // Download the current balance. wc.DownloadStringAsync(new Uri(strURL)); } else { Console.Write("Busy please try again"); } } //return and display the balance after the download has fully completed void wc_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e) { //Pass the result to the event handler } private bool isDisposed = false; //Dispose of the balance object public void Dispose() { if (!isDisposed) Dispose(true); GC.SuppressFinalize(this); } //Remove the event handlers private void Dispose(bool disposing) { isDisposed = true; if (disposing) { wc.DownloadProgressChanged -= new DownloadProgressChangedEventHandler(wc_DownloadProgressChanged); wc.DownloadStringCompleted -= new DownloadStringCompletedEventHandler(wc_DownloadStringCompleted); wc.Dispose(); } } } </code></pre>

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