Specifies the default data type that is used with the CopyDataOut method. If the default DataType property is not explicitly set, then the reported type is that of the last entered data through either the CopyDataIn method of the Item property. Acceptable input data types include Single, Double, Integer, Int16, Int64, Decimal and DateTime (VB) and float, double, int, Int16, Int64, decimal and DateTime (C#). When PointData is managed by the ChartDataArray, PointF objects may also be used.