WPF: Changing Resources (colors) from the App.xaml during runtime

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It looks like you’re trying to do some sort of skinning?

I’d recommend defining the resources in a Resource Dictionary contained in a separate file. Then in code (App.cs to load a default, then elsewhere to change) you can load the resources as so:

//using System.Windows
ResourceDictionary dict = new ResourceDictionary();
dict.Source = new Uri("MyResourceDictionary.xaml", UriKind.Relative);

Application.Current.Resources.MergedDictionaries.Add(dict);

You could also define the default resource dictionary in App.xaml and unload it in code just fine.

Use the MergedDictionaries object to change the dictionary you’re using at runtime. Works like a charm for changing an entire interface quickly.

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