Returns whether or not the field is a auto generated Values Label.  This is only applicable for row labels and column labels.

 public bool IsValuesLabel{ get; }
Public Property IsValuesLabel() As bool

Values labesl are automatically generated by Excel or ExcelWriter when there are two or more data fields in the PivotTable. They are effectively read-only and the values that are returned when reading certain properties are either null or a predetermined default value. Trying to set properties on a values labels will result in an exception.