using System; using System.Collections.Generic; namespace MatterHackers.MatterControl { public class SelectedListItems : List { public event EventHandler OnAdd; public event EventHandler OnRemove; new public void Add(T item) { base.Add(item); if (null != OnAdd) { OnAdd(this, null); } } new public void Remove(T item) { base.Remove(item); if (null != OnRemove) { OnRemove(this, null); } } // Also fire OnRemove on Clear new public void Clear() { base.Clear(); if (null != OnRemove) { OnRemove(this, null); } } } }