protected virtual void OnDocumentCompleted(DocumentCompletedEventArgs e)
        {
            var ev = DocumentCompleted;

            if (ev != null)
                ev(this, e);
        }
        protected virtual void OnDocumentCompleted(DocumentCompletedEventArgs e)
        {
            var ev = DocumentCompleted;

            if (ev != null)
            {
                ev(this, e);
            }
        }