Specifies how much bars and columns shall overlap on 2-D charts from -100 to 100. This is the property not Only of this series but of all series of parent series group - this is projection of appropriate group property. And so this property is read-Only. Use ParentSeriesGroup property for access to parent series group. Use ParentSeriesGroup.Overlap read/write property for change value. Read-Only SByte.... This is the property not only of this series but of all series...And so this property is read-only. Use ParentSeriesGroup property...