protected void OnJpegRetrieved(JpegEventArgs e)
 {
     if (JpegRetrieved != null)
     {
         JpegRetrieved(this, e);
     }
 }
 protected void OnJpegRetrieved(JpegEventArgs e)
 {
     if (JpegRetrieved != null)
     {
         JpegRetrieved(this, e);
     }
 }