how you can extract various instances of one object out of resources?

Download source files - here I often use a style&template that is magnificent possibility of WPF. It allows to define one style out of resources to many elements. I can easily define instance of some object in resources and extract it there where I require. But it has one limitation: For example for following: XAML: <Button x:Key="ButtonPrototype" /> C#: Resources["ButtonPrototype"]; - returns always one instance (like Singlton Pattern). But what can I make if I require more than one such object? It isn't problem as XAML is very flexible