protected void RegisterCollection <TWrapper, TModel>(
ChangeTrackingCollections <TWrapper> wrapperCollection,
List <TModel> modelCollection) where TWrapper : ModelWrapper <TModel>
{
wrapperCollection.CollectionChanged +=
(s, e) =>
{
if (e.OldItems != null)
{
foreach (var item in e.OldItems.Cast <TWrapper>())
{
modelCollection.Remove(item.Model);
}
}
if (e.NewItems != null)
{
foreach (var item in e.NewItems.Cast <TWrapper>())
{
modelCollection.Add(item.Model);
}
}
};
RegisterTrackingObject(wrapperCollection);
}
private void InitializeCollectionPropertes(Friend model)
{
if (model.Emails == null)
{
throw new ArgumentException("Emails can't be Null");
}
Emails = new ChangeTrackingCollections <FriendEmailWrapper>(
model.Emails.Select(e => new FriendEmailWrapper(e)));
RegisterCollection(Emails, model.Emails);
}