The number of major tick marks for the scale. For example, a gauge with a scale that runs from 0 to 100 should specify 10 tick marks. (The first tick mark, usually 0, is assumed - so there are actually 11 tick marks for a scale from 0 to 100.)
Set TickCount="0" for no tick marks.
For the InputSlider element, this attribute controls the detents, or stop points, as the thumb is dragged. Visible tick marks must be built into the image when the image is designed. The InputSlider does not automatically create visible tick marks.