FauxValueChangedEventManager.cs

public static class FauxValueChangedEventManager
{
    private delegate void OnValueChanged(object sender, EventArgs args);
    private delegate object GetItem(object indexer);

    private static object m_currentManager;
    private static MethodInfo m_onValueChanaged;
    private static MethodInfo m_getItem;

    static FauxValueChangedEventManager()
    {
        Type managerType = Type.GetType("MS.Internal.Data.ValueChangedEventManager, PresentationFramework, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35");
        PropertyInfo currentmanager = managerType.GetProperty("CurrentManager",
            BindingFlags.NonPublic | BindingFlags.Static);
        m_currentManager = currentmanager.GetValue(null, null);

        m_getItem = managerType.GetMethod("get_Item",
            BindingFlags.NonPublic | BindingFlags.Instance);

        Type valueChangedRecord = Type.GetType("MS.Internal.Data.ValueChangedEventManager+ValueChangedRecord, PresentationFramework, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35");
        m_onValueChanaged = valueChangedRecord.GetMethod("OnValueChanged", 
            BindingFlags.NonPublic | BindingFlags.Instance);
    }

    public static void NotifyPropertyChanged(object sender, string propertyName)
    {
        HybridDictionary records = (HybridDictionary)m_getItem.Invoke(
            m_currentManager, new object[] { sender });

        if (records != null)
        {
            var properties = TypeDescriptor.GetProperties(sender);
            var property = properties[propertyName];
            
            var record = records[property];
            if (record != null)
            {
                m_onValueChanaged.Invoke(record, new object[] { sender, null });
            }
        }
    }
}