Silverlight 3 - 在合并的ResourceDictionary中创建自定义对象

I have custom classes that I currently instantiate within App.xaml as resources. I want to move these custom objects into a Merged ResourceDictionary, where they are used within styles, and keep them close to where they are used. Here's an example of what I want, arbitrarily using fake converter objects, but they could be any custom object...I have custom classes that I currently instanti