I am a contractor and still relatively new to WPF. At my new contract I am working on a MVVM windows App using Prism. After loading my my controls in my "MainRegion" they highlight (change background color) on mouse over. I have searched hi and low for the code that is doing this and have not found it.
This code base does have a FormDictionary in it that is referenced in my base View and in the ContentControl referenced Views I have placed on the base View. The ContentControl referenced views are of type UserControl.