INotifyPropertyChanged and beyond - Part II

using System;
using System.ComponentModel;

namespace NotifyTest {
	/// <summary>
	/// This class extends <see cref="T:PropertyNotificationEventArgs"/> and
	/// allows for cancelling of the associated event.
	/// </summary>
	public class CancelPropertyNotificationEventArgs : PropertyNotificationEventArgs {
		#region Constructors

		/// <summary>
		/// Initializes a new instance of the
		/// <see cref="CancelPropertyNotificationEventArgs"/> class.
		/// </summary>
		/// <param name="propertyName">
		/// The name of the property that is associated with this
		/// notification.
		/// </param>
		public CancelPropertyNotificationEventArgs(String propertyName)
			: base(propertyName) {
			// No-op
		}

		/// <summary>
		/// Initializes a new instance of the
		/// <see cref="CancelPropertyNotificationEventArgs"/> class.
		/// </summary>
		/// <param name="propertyName">
		/// The name of the property that is associated with this
		/// notification.
		/// </param>
		/// <param name="oldValue">The old value.</param>
		/// <param name="newValue">The new value.</param>
		public CancelPropertyNotificationEventArgs(String propertyName,
			Object oldValue, Object newValue)
			: base(propertyName, oldValue, newValue) {
			// No-op
		}

		#endregion // Constructors

		#region Properties/Fields

		/// <summary>
		/// Holds a value indicating whether the associated event should be
		/// cancelled.
		/// </summary>
		private Boolean cancel = false;

		/// <summary>
		/// Gets or sets a value indicating whether the associated event should
		/// be cancelled.
		/// </summary>
		/// <value>
		/// <c>true</c> if the event should be cancelled; otherwise, <c>false</c>.
		/// </value>
		public Boolean Cancel {
			get {
				return this.cancel;
			}
			set {
				this.cancel = value;
			}
		}

		#endregion // Properties/Fields
	}
}