>If your code reads do_something_to_foo(foo), then very often usually it really ought to be foo.do_something() Personally I'd make an exception when using exte

>If your code reads do_something_to_foo(foo), then very often usually it really ought to be foo.do_something() Personally I'd make an exception when using extension methods in C#. If you make an extension method which looks (schematically) as follows: add_to_cart(this item, Cart cart) { cart.add(item); return item; } You can write code that looks like: item.add_to_cart(cart) .check_availability() .do_something_else() .etc() Well, this example isn't the best, but you get the general idea.