title: How do you color a rectangle in C# that has been declared in XAML in WPF?
body: <p>How do you color a rectangle in C# that has been declared in XAML in WPF?</p>
  
  <p>There is a rectangle control in XAML.  In my C# code there are times in which it would be nice to fill the background color.  How does one do this?</p>