//
 // Internal constructors
 //
 internal ValueCollectionEnumerator(TrackedCollection <T> trackingList, List <TrackedCollection <T> .ValueEl> combinedValues)
 {
     GlobalDebug.WriteLineIf(GlobalDebug.Info, "ValueCollectionEnumerator", "Ctor");
     _inner = new TrackedCollectionEnumerator <T>("ValueCollectionEnumerator", trackingList, combinedValues);
 }
 internal ValueCollectionEnumerator(TrackedCollection <T> trackingList, List <TrackedCollection <T> .ValueEl> combinedValues)
 {
     this.inner = new TrackedCollectionEnumerator <T>("ValueCollectionEnumerator", trackingList, combinedValues);
 }