/// <summary>
 /// Raises the <see cref="RequestSending" /> event.
 /// </summary>
 /// <param name="e">The <see cref="RequestSendingEventArgs" /> instance containing the event data.</param>
 protected void OnRequestSending(RequestSendingEventArgs e) {
     if (RequestSending != null)
         RequestSending(this, e);
 }