I recently set out to build a WPF application using the Composite Client Application Guidance (lovingly known as “Prism”) code base. Additionally, I wanted to make use of the Blacklight controls – specifically, the DragDockPanelHost and DragDockPanel controls – in the application. I soon discovered that these two code bases didn’t work together “right out of the box”. I found a problem, and a solution, and this post describes both the issue and its resolution. The architecture promoted by Prism is...