A Chained Property Observer

using System;

namespace ChainedObserver
{
    /// <summary>
    /// Provides a common base class for all nodes.
    /// Provides 2 properties :
    /// <list type="Bullet">
    /// <item>PropertyName : which is the name of the property the node is monitoring
    /// from the overall lambda expression provided to the <c>ChainedPropertyObserver</c></item>
    /// <item>NodeValue : Holds a WeakReference to the property value the node is monitoring
    /// from the overall lambda expression provided to the <c>ChainedPropertyObserver</c></item>
    /// </list>
    /// </summary>
    public class NodeBase
    {
        #region Data
        private WeakReference wrNodeValue;
        #endregion

        #region Ctor
        public NodeBase(object value, String name)
        {
            this.PropertyName = name;
            wrNodeValue = new WeakReference(value);
        }
        #endregion

        #region Public Properties
        public String PropertyName { get; set; }

        public object NodeValue
        {
            get
            {
                object target = wrNodeValue.Target;
                if (target != null)
                {
                    
                    return target;
                }
                return null;
            }
        }
        #endregion
    }

}