Hi all,

I want to have Dictionary that would be 'Observable' in order to throw events when its item changing.(Remove or Add).

In other class I created such dictionary and set Binding to ListBox.ItemsSourseProperty.
The Binding work well. I can see the items.

But something wrong. the event 'PropertyChanged' always null.

Can anyone help?

Thanks in advance!

class ObservableDictionary<TKey, TValue>:Dictionary<TKey, TValue>, INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;

        public new void Remove(TKey obj)
        {
            base.Remove(obj);

            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs("Remove"));
            }
        } 
    }