/// <summary>
 /// Releases unmanaged and - optionally - managed resources.
 /// </summary>
 /// <param name="disposing"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
 protected override void Dispose(bool disposing)
 {
     if (disposing)
     {
         SoapClient.CloseAsync();
     }
 }