Using IndexedCollection<T> and other collection classes|tag=LiveLinq to Objects: IndexedCollection(T) and other collection classes in LiveLinq to Objects, the element class T must implement the property change notification interface System.ComponentModel.INotifyPropertyChanged. The easiest way to satisfy this requirement is to derive that class from IndexableObject. Then you can use its method OnPropertyChanged to send the required property change notifications. For example, a Customer class can be defined like this: public class Customer : IndexableObject { ..................... private string _name; public string Name { get { return _name; } set { _name = value; OnPropertyChanged("Name"); } } ..................... }

Reference

IndexableObject Members
C1.LiveLinq.Collections Namespace