Экспорт данных из DataGridView в Excel - Visual Basic .NET

Public Class Form1
    Dim xlApp As Microsoft.Office.Interop.Excel.Application
    Dim xlWorkBook As Microsoft.Office.Interop.Excel.Workbook
    Dim xlWorkSheet As Microsoft.Office.Interop.Excel.Worksheet
    Dim misValue As Object = System.Reflection.Missing.Value

    Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
 
        Dim i As Integer
        Dim j As Integer
 
        xlApp = New Microsoft.Office.Interop.Excel.Application
        xlApp.Visible = True
        xlWorkBook = xlApp.Workbooks.Add(misValue)
        xlWorkSheet = xlWorkBook.Sheets("Лист1")
 
        For i = 0 To DataGridView1.RowCount - 1
 
            For j = 0 To DataGridView1.ColumnCount - 1
                For k As Integer = 1 To DataGridView1.Columns.Count
 
                    xlWorkSheet.Cells(1, k) = DataGridView1.Columns(k - 1).HeaderText
                    xlWorkSheet.Cells(i + 2, j + 1) = DataGridView1(j, i).Value.ToString()
 
                Next
            Next
        Next
 
        xlWorkSheet.SaveAs("C:\экспорт.xlsx")
        xlWorkBook.Close()
        xlApp.Quit()
 
        ReleaseObject(xlApp)
        ReleaseObject(xlWorkBook)
        ReleaseObject(xlWorkSheet)
 
        MsgBox("Ваш файл сохранен в C:\экспорт.xlsx")
 
    End Sub
 
    Private Sub ReleaseObject(ByVal obj As Object)
        'процедура выгрузки объектов из памяти
        Try
            System.Runtime.InteropServices.Marshal.ReleaseComObject(obj)
            obj = Nothing
        Catch ex As Exception
            obj = Nothing
        Finally
            GC.Collect()
        End Try
    End Sub
End Class