C1ProgressBar displays an animated repeating pattern of dots to indicate an indeterminate operation is in progress. When active in an application, the progress bar appear similar to the following image:

The two main properties in the C1ProgressBar control are ActualIsIndeterminate and IsIndeterminate.
•ActualIsIndeterminate
This property indicates whether the actual indeterminate property should be reflecting a specific value.
•IsIndeterminate
This property indicates if the C1ProgressBar displays continuous, indeterminate feedback.