Question

Right now I have some TabItems in my App which are implicitly styled. I want to add a “Night mode” to my app and change my style. How should I go about this?

Answer 1

Alfonso was right in idea…
but you have to do it like this in WPF

App.Current.Resources.MergedDictionaries.Clear(); 
Uri uri = new Uri("/Resources/GlassButton5Night.xaml", UriKind.Relative);
var resDict = Application.LoadComponent(uri) as ResourceDictionary;
App.Current.Resources.MergedDictionaries.Add(resDict);

And you have make sure you reset your MergedDictionaries at the right level