How to remove the html tags from file exported from grid view

    Sub New() 
        InitializeComponent()

        AddHandler Me.RadGridView1.CellFormatting, AddressOf RadGridView1_CellFormatting

    End Sub
    Private Sub RadForm1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Me.ProductsTableAdapter.Fill(Me.NwindDataSet.Products)
        Me.RadGridView1.BestFitColumns()

    End Sub

    Private Sub RadButton1_Click(sender As Object, e As EventArgs) Handles RadButton1.Click
        Dim fileName As String = "..\..\exported" & DateTime.Now.ToLongTimeString().Replace(":", "_") & ".xlsx"
        Dim exporter As Telerik.WinControls.Export.GridViewSpreadExport = New Telerik.WinControls.Export.GridViewSpreadExport(Me.RadGridView1) With {.HiddenColumnOption = HiddenOption.DoNotExport, .HiddenRowOption = HiddenOption.DoNotExport, .SummariesExportOption = SummariesOption.ExportAll, .ExportVisualSettings = True, .ExportViewDefinition = False}
        exporter.ExportVisualSettings = True
        exporter.RunExport(fileName, New SpreadExportRenderer())

        Process.Start(fileName)
    End Sub

    Dim boldFont As New Font("Arial", 10.0F, FontStyle.Bold)
    Private Sub RadGridView1_CellFormatting(sender As Object, e As Telerik.WinControls.UI.CellFormattingEventArgs)
        If e.Column.Name = "UnitPrice" AndAlso e.CellElement.Value IsNot Nothing AndAlso CInt(e.CellElement.Value) > 20 Then
            e.CellElement.Font = boldFont
        Else
            e.CellElement.ResetValue(LightVisualElement.FontProperty, ValueResetFlags.Local)
        End If

    End Sub