A Color expression that specifies the color to show the border on the line
number bar.
Use the LineNumberWidth property to show the control's
line number width. Use the BookmarkWidth
property to show the control's bookmark border. By default, the
LineNumberWidth property is 0. If the control's LineNumberWidth is zero the
control's line number border is hidden.
If the LineNumberWidth property is 0 the control displays no line numbers
border. If the LineNumberWidth property is less than 0 the control sets the
width of the line numbers border automatically. Use the LineNumberBackColor and LineNumberForeColor
properties to customize colors for the control's line numbers bar. Use the LineNumberFont
property to specify the font for the control's line numbers bar.