Lambda the Ultimate

I have an idea: what if we can convert a class to an interface with only a requirement that the class just need implements all the member of the interface without point out the interface in its declaration (this is similar to duck-typing but it has different principle, though i didn't know about duck-typing before writing the article). And when using an object with unknown type, I think the dynamic type isn't a perfect solution (because many error-exception could occur at runtime). To read complete article, please go to this link: http://dakurai.blogspot.com/2009/06/new-wild-idea-in-oop.html . Please read and give me some reply. Thanks you.