How to sort pivot fields in Excel using XlsIO?

//Sort pivot field items in the given order
IPivotField pivotField = pivotTable.Fields[0];
pivotField.Sort(new string[3] { pivotField.Items[1].Text, pivotField.Items[2].Text, pivotField.Items[0].Text });

using Syncfusion.XlsIO;
using System;
using System.Collections.Generic; 
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
 
namespace PivotTable
{
    class Program
    {
        static void Main(string[] args)
        {
            using (ExcelEngine excelEngine = new ExcelEngine())
            {
                //Instantiate the excel application object
                IApplication application = excelEngine.Excel;
 
                //The workbook is opened
                IWorkbook workbook;
 
                //Open existing workbook with data entered
                Assembly assembly = typeof(Program).GetTypeInfo().Assembly;
                Stream fileStream = assembly.GetManifestResourceStream("PivotTable.Sample.xlsx");
 
                workbook = application.Workbooks.Open(fileStream, ExcelOpenType.Automatic);
                //The first worksheet object in the worksheets collection is accessed
                IWorksheet pivotDataSheet = workbook.Worksheets[0];
                //A new worksheet is added into the workbook
                IWorksheet pivotTableSheet = workbook.Worksheets.Create();
 
                //Adding pivot table
                IPivotCache cache = workbook.PivotCaches.Add(pivotDataSheet["A1:D16"]);
                IPivotTable pivotTable = pivotTableSheet.PivotTables.Add("PivotTable1", pivotTableSheet["A1"], cache);
 
                pivotTable.Fields[0].Axis = PivotAxisTypes.Column;
                pivotTable.Fields[1].Axis = PivotAxisTypes.Row;
 
                //Adding data fields to pivot table
                pivotTable.DataFields.Add(pivotTable.Fields[2], "Sum", PivotSubtotalTypes.Sum);
                pivotTable.DataFields.Add(pivotTable.Fields[3], "Avg", PivotSubtotalTypes.Average);
 
                //Sorting pivot field items in the given order
                IPivotField pivotField = pivotTable.Fields[0];                
                pivotField.Sort(new string[3] { pivotField.Items[1].Text, pivotField.Items[2].Text, pivotField.Items[0].Text });
 
                //Saving and closing the workbook
                Stream stream = File.Create("Output.xlsx");
                pivotDataSheet.UsedRange.AutofitColumns();
                workbook.SaveAs(stream);
            }
        }
    }
}
 

Imports Syncfusion.XlsIO
Imports System
Imports System.Collections.Generic
Imports System.IO
Imports System.Linq
Imports System.Reflection
Imports System.Text
Imports System.Threading.Tasks
 
Namespace PivotTable
 
    Class Program
 
        Private Shared Sub Main(ByVal args() As String)
            Dim excelEngine As ExcelEngine = New ExcelEngine
            'Instantiate the excel application object
            Dim application As IApplication = excelEngine.Excel
            'The workbook is opened
            Dim workbook As IWorkbook
 
            'Open existing workbook with data entered
            Dim assembly As Assembly = GetType(Program).GetTypeInfo.Assembly
            Dim fileStream As Stream = assembly.GetManifestResourceStream("PivotTable.Sample.xlsx")
 
            workbook = application.Workbooks.Open(fileStream, ExcelOpenType.Automatic)
            'The first worksheet object in the worksheets collection is accessed
            Dim pivotDataSheet As IWorksheet = workbook.Worksheets(0)
            'A new worksheet is added into the workbook
            Dim pivotTableSheet As IWorksheet = workbook.Worksheets.Create
 
            'Adding pivot table
            Dim cache As IPivotCache = workbook.PivotCaches.Add(pivotDataSheet("A1:D16"))
            Dim pivotTable As IPivotTable = pivotTableSheet.PivotTables.Add("PivotTable1", pivotTableSheet("A1"), cache)
 
            pivotTable.Fields(0).Axis = PivotAxisTypes.Column
            pivotTable.Fields(1).Axis = PivotAxisTypes.Row
 
            'Adding data fields to pivot table
            pivotTable.DataFields.Add(pivotTable.Fields(2), "Sum", PivotSubtotalTypes.Sum)
            pivotTable.DataFields.Add(pivotTable.Fields(3), "Avg", PivotSubtotalTypes.Average)
            'Sorting pivot field items in the given order
            Dim pivotField As IPivotField = pivotTable.Fields(0)
            pivotField.Sort(New String() {pivotField.Items(1).Text, pivotField.Items(2).Text, pivotField.Items(0).Text})
 
            'Saving and closing the workbook
            Dim stream As Stream = File.Create("Output.xlsx")
            pivotDataSheet.UsedRange.AutofitColumns()
            workbook.SaveAs(stream)
        End Sub
    End Class
End Namespace