This property is present for inheritance by the ColumnChartAppearance class for use in Column and Stacked Column charts, it does not apply to 3-D chart types.
ColumnSpacing determines how much space is placed between columns. The value is specified in whole column width increments. The space will always by a multiple of the width of a column of data.
Series SpacingTarget Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2