| AppBarButton Properties | 
The AppBarButton type exposes the following members.
| Name | Description | |
|---|---|---|
| Caption | 
            Gets or sets the caption of the button, shown under the icon with small font.
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| IconKey | 
            Gets or sets the Icon Key of this AppbarButton.
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| IsChecked | 
            Gets or sets the check status of the button, if the current button is used as toggle button. (IsToggleButton = True)
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| IsCircleVisible | 
            Gets or Sets a value to indicate if a circle is visible outside the icon.
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| IsToggleButton | 
            Gets or sets the value if the button is used as a ToggleButton.
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