How to remove top and bottom borders in PDF table using C# and VB.NET

using Syncfusion.Pdf;
using Syncfusion.Pdf.Graphics;
using Syncfusion.Pdf.Grid;
using System.Drawing;

Imports Syncfusion.Pdf
Imports Syncfusion.Pdf.Graphics
Imports Syncfusion.Pdf.Grid
Imports System.Drawing

//Create a new PDF document
PdfDocument pdfDocument = new PdfDocument();
//Add a page to the document
PdfPage pdfPage = pdfDocument.Pages.Add();
//Create a new PdfGrid
PdfGrid pdfGrid = new PdfGrid();
//Add columns
pdfGrid.Columns.Add(4);
string[] name = new string[3] { "Clay", "John", "Simons" };
//Add header
PdfGridRow header = pdfGrid.Rows.Add();
header.Cells[0].Value = "ID";
header.Cells[1].Value = "Name";
header.Cells[2].Value = "Type";
header.Cells[3].Value = "Date";
//Add style
header.Style.Font = new PdfStandardFont(PdfFontFamily.TimesRoman, 12, PdfFontStyle.Bold);
//Add rows to the table
for (int i = 0; i < 3; i++)
{
    PdfGridRow row = pdfGrid.Rows.Add();
    row.Cells[0].Value = i.ToString();
    row.Cells[1].Value = name[i];
    row.Cells[2].Value = "AAA";
    row.Cells[3].Value = DateTime.Now.ToString();
}
//Create and customize the string formats
PdfStringFormat format = new PdfStringFormat();
format.Alignment = PdfTextAlignment.Center;
format.LineAlignment = PdfVerticalAlignment.Middle;
//Specify the style for PdfGridCell
PdfGridCellStyle cellStyle = new PdfGridCellStyle();
cellStyle.Borders.Bottom.Color = new PdfColor(Color.Transparent);
cellStyle.Borders.Top.Color = new PdfColor(Color.Transparent);
cellStyle.StringFormat = format;
for (int i = 0; i < pdfGrid.Rows.Count; i++)
{
    for (int j = 0; j < pdfGrid.Rows[i].Cells.Count; j++)
    {
        //Apply style
        pdfGrid.Rows[i].Cells[j].Style = cellStyle;                                 
    }
}
//Draw the PdfGrid
pdfGrid.Draw(pdfPage, PointF.Empty);
//Save the document
pdfDocument.Save("Table.pdf");
//Close the document
pdfDocument.Close(true);
//This will open the PDF file so, the result will be seen in default PDF Viewer 
Process.Start("Table.pdf");

'Create a new PDF document
Dim pdfDocument As PdfDocument = New PdfDocument()
'Add a page to the document
Dim pdfPage As PdfPage = pdfDocument.Pages.Add()
'Create a new PdfGrid
Dim pdfGrid As PdfGrid = New PdfGrid()
'Add columns
pdfGrid.Columns.Add(4)
Dim name As String() = New String(2) {"Clay", "John", "Simons"}
'Add header
Dim header As PdfGridRow = pdfGrid.Rows.Add()
header.Cells(0).Value = "ID"
header.Cells(1).Value = "Name"
header.Cells(2).Value = "Type"
header.Cells(3).Value = "Date"
'Add style
header.Style.Font = New PdfStandardFont(PdfFontFamily.TimesRoman, 12, PdfFontStyle.Bold)
'Add rows to the table
For i As Integer = 0 To 3 - 1
    Dim row As PdfGridRow = pdfGrid.Rows.Add()
    row.Cells(0).Value = i.ToString()
    row.Cells(1).Value = name(i)
    row.Cells(2).Value = "AAA"
    row.Cells(3).Value = DateTime.Now.ToString()
Next
'Create and customize the string formats
Dim format As PdfStringFormat = New PdfStringFormat()
format.Alignment = PdfTextAlignment.Center
format.LineAlignment = PdfVerticalAlignment.Middle
 
'Specify the style for PdfGridCell
Dim cellStyle As PdfGridCellStyle = New PdfGridCellStyle()
cellStyle.Borders.Bottom.Color = New PdfColor(Color.Transparent)
cellStyle.Borders.Top.Color = New PdfColor(Color.Transparent)
cellStyle.StringFormat = format
 
For i As Integer = 0 To pdfGrid.Rows.Count - 1
 
    For j As Integer = 0 To pdfGrid.Rows(i).Cells.Count - 1
        'Apply style
        pdfGrid.Rows(i).Cells(j).Style = cellStyle
    Next
Next
'Draw the PdfGrid
pdfGrid.Draw(pdfPage, PointF.Empty)
'Save the document
pdfDocument.Save("Table.pdf")
'Close the document
pdfDocument.Close(True)
'This will open the PDF file so, the result will be seen in default PDF Viewer 
Process.Start("Table.pdf")