INotifyPropertyChanged generic proxy implementation based on DynamcObject and the DLR

DynamicBindingProxy.cs

// http://www.deanchalk.me.uk/post/WPF-e28093-Easy-INotifyPropertyChanged-Via-DynamicObject-Proxy.aspx

public class DynamicBindingProxy<T> : DynamicObject, INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;
    private static readonly Dictionary<string, Dictionary<string, PropertyInfo>> properties =
        new Dictionary<string, Dictionary<string, PropertyInfo>>();
    private readonly T instance;
    private readonly string typeName;

    public DynamicBindingProxy(T instance)
    {
        this.instance = instance;
        var type = typeof(T);
        typeName = type.FullName;
        if (!properties.ContainsKey(typeName))
            SetProperties(type, typeName);
    }

    private static void SetProperties(Type type, string typeName)
    {
        var props = type.GetProperties(BindingFlags.Public | BindingFlags.Instance);
        var dict = props.ToDictionary(prop => prop.Name);
        properties.Add(typeName, dict);
    }

    public override bool TryGetMember(GetMemberBinder binder, out object result)
    {
        if (properties[typeName].ContainsKey(binder.Name))
        {
            result = properties[typeName][binder.Name].GetValue(instance, null);
            return true;
        }
        result = null;
        return false;
    }

    public override bool TrySetMember(SetMemberBinder binder, object value)
    {
        if (properties[typeName].ContainsKey(binder.Name))
        {
            properties[typeName][binder.Name].SetValue(instance, value,null);
            if (PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs(binder.Name));
            return true;
        }
        return false;
    }
}