The Busy Indicator control provides a set of pre-built animations including spinner bars, spinner balls, gears, progress bar, and more..
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The Busy Indicator control has two modes - determinate and indeterminate. When the control is in determinate mode, the underlying activity progress is displayed.
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Display Progress

The content beneath the Busy Indicator animation is fully customizable.
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Configurable Busy Content

A UIElement can be specified to receive the focus when the Busy Indicator control is no longer active.
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Configurable Focus Element

The overlay style of the Busy Indicator control is easily changed just by setting the OverlayStyle property to a Rectangle element.
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Stylable Overlay

A full set of themes is provided for all Busy Indicator animations.
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Themes

The Busy Indicator control may appear after a specified delay.
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Delayed Start