c# - Observable dictionary not behaving as expected -

I want to 'overview' to throw that object when its item changes (remove or add).

I can see the item.

But there is something wrong: the event changed the contact always zero

Can anyone help?

Thanks in advance!

  class observableDictionary & lt; Vaccines, TVs & gt; : Dictionary & lt; Vaccines, TVs & gt ;, INotifyPropertyChanged {Public Events PropertyChangedEventHandler PropertyChanged; Remove public new zeroes (vaccine OBJ) {base.Remove (obj); If (property changed! = Null) {property changed (this, event property ("remove") by changing new asset;); }}}  

call to propertyChanged to call you You must not have the archive change event you need to implement the INotifyCollectionChanged .