void OnItemPropertyChanged(object sender, PropertyChangedEventArgs e)
{
Kontakt kontakt = sender as Kontakt;
if (kontakt != null)
{
ModifiedKontakte.Add(kontakt);
}
}
void OnCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (e.NewItems != null)
{
foreach (Kontakt newItem in e.NewItems)
{
ModifiedKontakte.Add(newItem);
newItem.PropertyChanged += this.OnItemPropertyChanged;
}
}
if (e.OldItems != null)
{
foreach (Kontakt oldItem in e.OldItems)
{
ModifiedKontakte.Add(oldItem);
oldItem.PropertyChanged -= this.OnItemPropertyChanged;
}
}
}