/// <summary>
/// Begins an asynchronous request to shut the connection down.
/// </summary>
/// <param name="callback">The <see cref="AsyncCallback"/> delegate.</param>
/// <param name="state">An object containing state information for this request.</param>
/// <returns>An <see cref="IAsyncResult"/> that references the asynchronous shutdown.</returns>
/// <exception cref="InvalidOperationException"><see cref="BeginShutdown"/> has already been called.</exception>
// Thanks to Michael J. Moore and Stefan Bernbo for notifying us about a bug in this method.
public IAsyncResult BeginShutdown(AsyncCallback callback, object state)
{
if (m_ShutdownResult != null)
{
throw new InvalidOperationException();
}
AsyncResult ar = new AsyncResult(callback, state, null);
m_ShutdownResult = ar;
if (!this.Connected)
{
ar.Notify(null);
}
else if (SecureProtocol == SecureProtocol.None)
{
base.Shutdown(SocketShutdown.Both);
ar.Notify(null);
}
else
{
m_Controller.BeginShutdown(new AsyncCallback(this.OnShutdown), null);
}
return(ar);
}
/// <summary>
/// Begins an asynchronous request to shut the connection down.
/// </summary>
/// <param name="callback">The <see cref="AsyncCallback"/> delegate.</param>
/// <param name="state">An object containing state information for this request.</param>
/// <returns>An <see cref="IAsyncResult"/> that references the asynchronous shutdown.</returns>
/// <exception cref="InvalidOperationException"><see cref="BeginShutdown"/> has already been called.</exception>
// Thanks to Michael J. Moore and Stefan Bernbo for notifying us about a bug in this method.
public IAsyncResult BeginShutdown(AsyncCallback callback, object state) {
if (m_ShutdownResult != null)
throw new InvalidOperationException();
AsyncResult ar = new AsyncResult(callback, state, null);
m_ShutdownResult = ar;
if (!this.Connected) {
ar.Notify(null);
} else if (SecureProtocol == SecureProtocol.None) {
base.Shutdown(SocketShutdown.Both);
ar.Notify(null);
} else {
m_Controller.BeginShutdown(new AsyncCallback(this.OnShutdown), null);
}
return ar;
}