public static void SetX509Enumerable(this SignedXml signedXml, IEnumerator x509Enumerable)
 {
     X509EnumerableField.SetValue(signedXml, x509Enumerable);
 }
 public static IEnumerator GetX509Enumerable(this SignedXml signedXml)
 {
     return((IEnumerator)X509EnumerableField.GetValue(signedXml));
 }