protected override void Act()
        {
            Uri extensionsUri = UriTestHelper.GetTestResourceUri("SomeResourceFile.xaml");

            GlobalResources.AddExtendedDictionary((ResourceDictionary)Application.LoadComponent(extensionsUri));
            GlobalResources.AddExtendedDictionary((ResourceDictionary)Application.LoadComponent(extensionsUri));
        }
        protected override void Arrange()
        {
            base.Arrange();
            GlobalResources.SetDictionary(new KeyedResourceDictionary());
            extendedDictionary = GlobalResources.Get("ExtendedDictionary");

            Uri extensionsUri = UriTestHelper.GetTestResourceUri("SomeResourceFile.xaml");

            dictionaryOne = (ResourceDictionary)Application.LoadComponent(extensionsUri);

            dictionaryTwo = new ResourceDictionary();
            GlobalResources.AddExtendedDictionary(dictionaryOne);
            GlobalResources.AddExtendedDictionary(dictionaryTwo);
        }