.NET Framework 4.6 and 4.5
When overridden in a derived class, performs additional work after the Insert or Add method adds an item to the collection.
protected virtual void OnInsertComplete(
Collections derived from StateManagedCollection can override the OnInsertComplete method to perform any additional work after an item is added to the collection using the Add or Insert method.
Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0