Accessing "current class" from WPF custom MarkupExtension

I'm attempting to write a custom MarkupExtension to make my life easier by giving me a better way to specify bindings in XAML. However I would like to know if there is any way I can access the object that represents the file the MarkupExtension is used in.

In other words, suppose I have a UserContro开发者_如何学JAVAl that defines a particular rendition of a data model of my program. This control has lots of visual stuff like grids, borders and general layout. If I use my MarkupExtension on a particular property of some element in this UserControl, I want to access the instance of the UserControl, without knowing what type it is (I plan on using reflection).

Is this at all possible?

In .NET 4.0, they added the IRootObjectProvider ability, but unfortunately, it isn't possible in previous versions. If you are in .NET 4.0, you can do the following:

public override object ProvideValue(IServiceProvider serviceProvider)
{
    var rootObjectProvider = serviceProvider.GetService(typeof(IRootObjectProvider)) as IRootObjectProvider;
    var root = rootObjectProvider.RootObject;
    // do whatever you need to do here
}