[B! WPF日記] yakiimo02のブックマークFrameworkElement (FE) derives from UIElement. FrameworkContentElement (FCE) derives from ContentElement. Since the framework is not built on a language that supports multiple inheritance (and thank god for that!), the divergence was necessary. There are parts of ContentElement that you wouldn’t want in every FE and there are parts of UIElement that you wouldn’t want in every FCE. FCE basically
