XNA Storyboard Animation project

Although the Silverlight/WPF Story Board approach is very powerfull, the animated object need to implement a very intrusive contract ( the inheritance and the Dependecy Properties ).

Why not make a more functional approach?

The only downside I've personally found would be when you need to implement a different base class that you don't have access to (DrawableGameComponent, for example). Since you obviously can't make DrawableGameComponent inherit from DependencyObject, it becomes a bit of an annoyance (though, not one that can't be overcome, just not as cleanly).

I personally quite like the DependencyObject/Property approach because of it's flexibility. Out of curiosity, what approach would you find "more functional"?

Exactly... the inheritance is really a problem...

but for example...

FloatAnimation fa = new FloatAnimation()
{
Duration = TimeSpan.FromSeconds( 1.0 ),
From = 0.0f,
To = 1.0f,
TargetAction = ( value ) => UserControl.Opacity = value
};

This is an excellent suggestion, thanks! I'll look into it and see about adding this functionality, so that either option is available

I have updated the project and have released version 1.1 to CodePlex.

Thanks and let me know what else I can do to improve!

I have a XNA project too, in Codeplex ( http://machinaaurum.codeplex.com/ ), maybe we can exchange some ideas. I will send you a private message with my email and live messenger.