Progress Spinners
Progress spinners are used when some form of processing is occurring to tell the end user that something is happening.

A large RingSpinner control
RingSpinner Overview
The RingSpinner control renders an animated ring where the two ring segment ends chase each other around the circle.

A couple RingSpinner controls
The IsSpinning property must be set to true to activate animated spinning.
The outer radius of the ring will be auto-calculated based on the Width and Height of the control. They always should be set. For instance, if Width and Height are 16 and there is no Padding set, the ring's radius will be 8.
The BorderBrush and BorderThickness properties specify the brush and thickness of the ring, extending inward from the outer radius.