/// <summary>
/// Gets the persisten ID of the current IITObject.
/// </summary>
/// <returns>
/// A PersistentID that represents this IITObject or PersistentID.Empty if this
/// instance does not derive from IITObject.
/// </returns>
protected PersistentID GetPersistentID(IITObject obj)
{
if (persistentID.IsEmpty)
{
int high = 0;
int low = 0;
if (itunes != null)
{
Invoke((Action) delegate
{
object refobj = obj;
itunes.GetITObjectPersistentIDs(ref refobj, out high, out low);
// do not Release(refobj) here or we'll blow away the original obj!
});
}
return(new PersistentID(high, low));
}
return(persistentID);
}