/// <summary>
/// Initializes a new instance of the <see cref="CollectionPropertyChangedEventArgs"/> class.
/// </summary>
/// <param name="action">The action that caused the event.</param>
/// <param name="newItems">The list of new items involved in the change.</param>
/// <param name="oldItems">The list of items affected by a replacement, removal, or movement of members within a collection.</param>
public CollectionPropertyChangedEventArgs(CollectionPropertyChangedAction action, IList?newItems, IList?oldItems)
: this(action)
{
if (newItems != null)
{
NewItems = newItems;
}
if (oldItems != null)
{
OldItems = oldItems;
}
}
/// <summary> /// Initializes a new instance of the <see cref="CollectionPropertyChangedEventArgs"/> class. /// </summary> /// <param name="action">The action that caused the event.</param> private CollectionPropertyChangedEventArgs(CollectionPropertyChangedAction action) => Action = action;
