How do you color a rectangle in C# that has been declared in XAML in WPF?

Question

How do you color a rectangle in C# that has been declared in XAML in WPF?

There is a rectangle control in XAML. In my C# code there are times in which it would be n

Answer 1

Rectangle blueRectangle = new Rectangle();
// Fill rectangle with blue color
blueRectangle.Fill = blueBrush;