Sets or returns whether the PivotTable will display in classic layout mode

 public boolean ClassicLayout{ get; set; }
Public Property ClassicLayout() As Boolean

          ExcelApplication xla = new ExcelApplication();
          Workbook wb = xla.Open(@"C:\MySpreadsheet.xlsx");
          Worksheet ws = wb.Worksheets[0];
          ws.PivotTables[0].PivotTableSettings.ClassicLayout = true;
        

          Dim xla As New ExcelApplication()
          Dim wb As Workbook = xla.Open("C:\MySpreadsheet.xlsx")
          Dim ws As Worksheet = wb.Worksheets(0)
          ws.PivotTables(0).PivotTableSettings.ClassicLayout = true;
        

This property corresponds to the Classic PivotTable layout setting under PivotTable Options on the display tab. This enables dragging of fields in the grid.