public bool PersistNewContact(Contact contact)
        {
            using (var context = new ContactAggregateContext()) {
            context.Contacts.Add(contact);
            contact.SetModifiedDate();

            try {
              int response = context.SaveChanges();
              if (response > 0) {
            PublishContactPersistedEvent(contact, true);
              }
              return true;
            }
            catch (Exception ex) {
              throw ex;
            }
              }
        }
 public bool PersistChangeToContact(Contact contact)
 {
     using (var context = new ContactAggregateContext()) {
     context.Contacts.Attach(contact);
     contact.SetModifiedDate();
     context.Entry(contact).State = EntityState.Modified;
     try {
       int response = context.SaveChanges();
       if (response > 0) {
     if (contact.Events.OfType<ContactNameFixedEvent>().Any()) {
       PublishContactPersistedEvent(contact, false);
     }
     return true;
       }
       return false;
     }
     catch (Exception ex) {
       throw ex;
     }
       }
 }