Sets or Returns a formula referencing a range of cells (e.g. "A1:A5"). The values in these cells are used for the labels on the primary category (x) axis of the chart. For scatter and bubble charts, this property will return an empty string. To get the values used on the horizontal axis for a scatter or bubble series, use Series.ScatterValues instead.

public System.String CategoryData{ get; set; }
Public Property CategoryData() As String