Represents an item in a PivotTable field.
Each item represents a unique entry from a field in the source data. All field items are stored in the PivotItemCollection collection returned by the PivotField.Items property. An individual PivotItem object can be accessed in the collection using indexer notation.
In addition to the items from the source data, a pivot field can also contain one or more calculated items, whose values are produced based on custom formulas. To add a calculated item to the PivotTable field, use the PivotCalculatedItemCollection.Add method of the PivotField.CalculatedItems collection.