Step:3 Runtime Views
a) Testing FindResource: Button's
default background
SolidColorBrush azureBrush = Brushes.Azure;
App application = (App)Application.Current;
application.Resources.Add("background", azureBrush);
btn1.Background = (SolidColorBrush)btn1.FindResource("background");
b) Testing Brushes.Red;
c) Testing: btn1.SetResourceReference(BackgroundProperty, "dynBrush")
c) Testing "findRes" (FindResource)