public DisposableType(GuidLookupService service, string guid)
 {
     _service = service;
     _guid = guid;
     _service.IsDisposed[_guid] = false;
 }
 public DisposableType(GuidLookupService service, string guid)
 {
     _service = service;
     _guid    = guid;
     _service.IsDisposed[_guid] = false;
 }