This property defines when riser borders are drawn. Automatic mode (0) only draws borders for small data sets that consist of less than 900 risers. You can also set the property so that riser borders are always drawn or never drawn.
value = getRiserBorderMode();
Can be one of the following:
0 for automatic, borders drawn only for small data sets (fewer than 900 risers).
1 for borders never drawn.
2 for borders are always drawn. 2 is the default value.
See SeriesDefaultBorderColor, SeriesDefaultTransparentBorderColor, UseSeriesBorderDefaults.