Assembly: Microsoft.Office.Interop.Excel (in microsoft.office.interop.excel.dll)
Down bars connect points on the first series in the chart group with lower values on the last series (the lines go down from the first series). Only 2-D line groups that contain at least two series can have down bars. This object isn’t a collection. There’s no object that represents a single down bar; you either have up bars and down bars turned on for all points in a chart group or you have them turned off.
Use the DownBars property to return the DownBars object.
If the HasUpDownBars property is False, most properties of the DownBars object are disabled.