I\'ve been searching the past few days trying to get an error fixed in a WPF application using Prism, but haven\'t had any luck and thought I\'d see if Stackoverflow had any
I had the same exception (Prism 5.0) and my solution was to set the type of the config section to Microsoft.Practices.Prism.Composition instead of Microsoft.Practices.Prism which I found in many examples.