regarding ObservableCollection in c#

Question

i found a piece of code that use ObservableCollection but they can use list or any other collection related classes. can anyone tell me what is the benifit of using ObservableCollection.

ObservableCollection<Employee> empData = new ObservableCollection<Employee> 
        {
            new Employee{Name="Diptimaya Patra", Contact="0000", 
                EmailID="[email protected]", Country="India"},
            new Employee{Name="Dhananjay Kumar", Contact="00020", 
                EmailID="[email protected]", Country="India"},
            new Employee{Name="David Paul", Contact="1230", 
                EmailID="[email protected]", Country="India"},
            new Employee{Name="Christina Joy", Contact="1980", 
                EmailID="[email protected]", Country="UK"},
            new Employee{Name="Hiro Nakamura", Contact="0000", 
                EmailID="[email protected]", Country="Japan"},
            new Employee{Name="Angela Patrelli", Contact="0000", 
                EmailID="[email protected]", Country="Japan"},
            new Employee{Name="Zoran White", Contact="0000", 
                EmailID="[email protected]", Country="Scotland"},
        };

please discuss in detail. thanks

Answer 1

The benefit of ObservableCollection is that it raises the CollectionChanged event every time the collection is changed, and the PropertyChanged event every time one of the properties of the collection is changed.

In a similar way, if you want an object (which is not a collection) to raise an event every time one of its properties change, you should make it implement INotifyPropertyChanged.