UIDVALIDITY: The unique identifier validity value. Any change of unique identifiers between sessions MUST be detectable using the change of UIDVALIDITY. If unique identifiers from an earlier session fail to persist in this session, the UIDVALIDITY value MUST be greater than the one used in the earlier session.

public long UIDValidity { get; set; }

Public Property UIDValidity As Long
	Get
	Set

public:
property long long UIDValidity {
	long long get ();
	void set (long long value);
}