partial         void CopyExtraPropertiesToClone(QueuedMessage clone, bool includeLocalProperties);
 public QueuedMessage Clone(bool includeLocalProperties)
 {
     var c = new QueuedMessage
             {
                 Body = Body,
                 EnqueuedAt = EnqueuedAt,
                 Id = Id,
                 Subject = Subject,
                 To = To.Select(x=>x.Clone(includeLocalProperties)).ToList(),
             };
     CopyExtraPropertiesToClone(c, includeLocalProperties);
     return c;
 }