using System;

namespace Framework.Support {

  /// <summary>Notifications for a collection that reports when its contents change</summary>
  public interface IObservableCollection<TItem> {

    /// <summary>Called before the collection is cleared</summary>
    event Action Clearing;
    /// <summary>Called after the collection has been cleared</summary>
    event Action Cleared;
    /// <summary>Called when an item has been added into the collection</summary>
    event Action<TItem> ItemAdded;
    /// <summary>Called before an item gets removed from the collection</summary>
    event Action<TItem> ItemRemoved;

  }

} // namespace Framework.Support