Introduction
This progressbar was designed in Adobe Illustrator and templated in WPF.
Using the code
This is the XAML code to be used in WPF or Silverlight. The progressbar is indeterminate.
//
ProgressBar HorizontalAlignment="Center" VerticalAlignment="Center"
Margin="0" Style="{DynamicResource ProgressBarStyle}" IsIndeterminate="True" FontSize="18.667"
...
Conclusion
This is a WPf circular indeterminate progressbar and you can use this in your application for loading processes which are in an indeterminate state.