This class contains additional info about an add or remove operation For more information see ChildControlCollection
The basic collection class with events which notifies when new items have been added or removed
Arguments to a PopupCancelEvent. Provides a reference to the popup form that is to be closed and allows the operation to be canceled.
Contains event information for a PopupClosed event.
Represents an object which can be observed by IObserver objects.
Represents an object which can observe other IObservable objects