How to skip grid header on drawing multiple grid in PDF 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

PdfLayoutResult layoutResult = null;
int columnCount;
int count = 0;
private void button1_Click(object sender, EventArgs e)
{
    //Create new PDF document
    PdfDocument document = new PdfDocument();
    //Add a page to the document 
    PdfPage page = document.Pages.Add();
    //Create a PdfGrid
    PdfGrid pdfGrid = new PdfGrid();
    for (int i = 0; i <= 3; i++)
    {
        count = 0;
        //Create a DataTable
        DataTable table = new DataTable();
        //Add columns to table
        table.Columns.Add("Line No");
        table.Columns.Add("Item Name");
        table.Columns.Add("Item Group");
        table.Columns.Add("Description");
        table.Columns.Add("Qty");
        table.Columns.Add("Price");
        table.Columns.Add("Line Total");
        table.Columns.Add("Doc Entry");
        //Assign Column count
        columnCount = table.Columns.Count;
        for (int j = 0; j < 40; j++)
        {
            //Add rows to table
            table.Rows.Add(new string[] { j.ToString(), "Coil", "Row material", "coil", "12", "100", "1200", i.ToString() });
        }
        //Assign data source
        pdfGrid.DataSource = table;
        pdfGrid.RepeatHeader = true;
        pdfGrid.BeginCellLayout += PdfGrid_BeginCellLayout;
        //Create a second PdfGrid
        PdfGrid grid = new PdfGrid();
        //Create a data table for second PdfGrid
        DataTable grid_dataTable = new DataTable();
        //Add columns to second table
        grid_dataTable.Columns.Add("Header");
        //Add rows
        grid_dataTable.Rows.Add(new string[] { "Group " + (i + 1).ToString() });
        //Assign data table
        grid.DataSource = grid_dataTable;
        grid.BeginCellLayout += Grid_BeginCellLayout;
        //Set style
        grid.Style.Font = new PdfStandardFont(PdfFontFamily.Helvetica, 8, PdfFontStyle.Bold);
        //Draw group information
        if (layoutResult == null)
            layoutResult = grid.Draw(page, new PointF(0, 0));
        else
            layoutResult = grid.Draw(layoutResult.Page, new PointF(0, layoutResult.Bounds.Bottom - grid.Rows[0].Height));
        PointF point = new PointF(0, layoutResult.Bounds.Bottom);
        // Value(50 - used defined) indicate whether the header should draw into page or not
        if (layoutResult.Bounds.Bottom > 50)
        {
            point = new PointF(0, layoutResult.Bounds.Bottom - layoutResult.Bounds.Height);
        }
        //Draw the table 
        if (layoutResult == null)
            layoutResult = pdfGrid.Draw(page, new PointF(0, 0));
        else
            layoutResult = pdfGrid.Draw(layoutResult.Page, point);
    }
    //Save the document 
    document.Save("Table.pdf");
    //Close the document
    document.Close(true);
    //This will open the PDF file so, the result will be seen in default PDF Viewer
    Process.Start("Table.pdf");
}
private void Grid_BeginCellLayout(object sender, PdfGridBeginCellLayoutEventArgs args)
{
    count++;
    PdfGrid grid = (sender as PdfGrid);
    if (count <= grid.Headers.Count * grid.Columns.Count)
    {
        args.Skip = true;
    }
}
private void PdfGrid_BeginCellLayout(object sender, PdfGridBeginCellLayoutEventArgs args)
{
    if (args.RowIndex == 0 && args.CellIndex <= columnCount && layoutResult != null)
    {
        if (layoutResult.Bounds.Y > args.Bounds.Height)
        {
            args.Skip = true;
        }
        else
        {
            args.Skip = false;
        }
    }
}

Dim layoutResult As PdfLayoutResult = Nothing
Dim columnCount As Integer
Dim count As Integer = 0
Private Sub button1_Click(ByVal sender As Object, ByVal e As System.EventArgs)
    'Create new Pdf document
    Dim document As PdfDocument = New PdfDocument()
    'Add a page to the document 
    Dim page As PdfPage = document.Pages.Add()
    'Create a PdfGrid
    Dim pdfGrid As PdfGrid = New PdfGrid()
    For i As Integer = 0 To 3
        count = 0
        'Create a DataTable
        Dim table As DataTable = New DataTable()
        'Add columns to table
        table.Columns.Add("Line No")
        table.Columns.Add("Item Name")
        table.Columns.Add("Item Group")
        table.Columns.Add("Description")
        table.Columns.Add("Qty")
        table.Columns.Add("Price")
        table.Columns.Add("Line Total")
        table.Columns.Add("Doc Entry")
        'Assign Column count
        columnCount = table.Columns.Count
        'Add rows to Table
        For j As Integer = 0 To 40 - 1
            table.Rows.Add(New String() {j.ToString(), "Coil", "Row material", "coil", "12", "100", "1200", i.ToString()})
        Next
        'Assign data source
        pdfGrid.DataSource = table
        pdfGrid.RepeatHeader = True
        AddHandler pdfGrid.BeginCellLayout, New PdfGridBeginCellLayoutEventHandler(AddressOf PdfGrid_BeginCellLayout)
        'Create a second PdfGrid
        Dim grid As PdfGrid = New PdfGrid()
        'Create a data table for second PdfGrid
        Dim grid_dataTable As DataTable = New DataTable()
        'Add columns to second table
        grid_dataTable.Columns.Add("Header")
        'Add rows
        grid_dataTable.Rows.Add(New String() {"Group " & (i + 1).ToString()})
        'Assign data table
        grid.DataSource = grid_dataTable
        AddHandler grid.BeginCellLayout, New PdfGridBeginCellLayoutEventHandler(AddressOf Grid_BeginCellLayout)
        'Set style
        grid.Style.Font = New PdfStandardFont(PdfFontFamily.Helvetica, 8, PdfFontStyle.Bold)
        'Draw group information
        If layoutResult Is Nothing Then
            layoutResult = grid.Draw(page, New PointF(0, 0))
        Else
            layoutResult = grid.Draw(layoutResult.Page, New PointF(0, layoutResult.Bounds.Bottom - grid.Rows(0).Height))
        End If
        Dim point As PointF = New PointF(0, layoutResult.Bounds.Bottom)
        'Value(50 - used defined) indicate whether the header should draw into page or not
        If layoutResult.Bounds.Bottom > 50 Then
            point = New PointF(0, layoutResult.Bounds.Bottom - layoutResult.Bounds.Height)
        End If
        'Draw the table 
        If layoutResult Is Nothing Then
            layoutResult = pdfGrid.Draw(page, New PointF(0, 0))
        Else
            layoutResult = pdfGrid.Draw(layoutResult.Page, point)
        End If
    Next
    'Save the document
    document.Save("Table.pdf")
    'Close the document
    document.Close(True)
    'This will open the PDF file so, the result will be seen in default PDF Viewer
    Process.Start("Table.pdf")
End Sub
Private Sub Grid_BeginCellLayout(ByVal sender As Object, ByVal args As PdfGridBeginCellLayoutEventArgs)
    count += 1
    Dim grid As PdfGrid = (TryCast(sender, PdfGrid))
    If count <= grid.Headers.Count * grid.Columns.Count Then
        args.Skip = True
    End If
End Sub
Private Sub PdfGrid_BeginCellLayout(ByVal sender As Object, ByVal args As PdfGridBeginCellLayoutEventArgs)
    If args.RowIndex = 0 AndAlso args.CellIndex <= columnCount AndAlso layoutResult IsNot Nothing Then
        If layoutResult.Bounds.Y > args.Bounds.Height Then
            args.Skip = True
        Else
            args.Skip = False
        End If
    End If
End Sub