Use the MajorTickCount and MinorTickCount properties to specify the number of tickmarks shown on a circular scale. The appearance of major and minor tickmarks is specified by the MajorTickmark and MinorTickmark properties, correspondingly.
In the image below, MajorTickCount = 11, which generated 11 major tickmarks: for the 0, 10, 20, 30, 40, 50, 60, 70, 80, 90 and 100 values.

This means, for example, if the MinValue is set to 0 and MaxValue is set to 12 and you want to show a major tickmark (and a label) for each integer value, you should set the MajorTickCount property to 13.

Also note that if you don't need to show the first or the last major tickmarks, or both - you can hide them by setting the ShowFirst and ShowLast properties of the MajorTickmark object to false.
