ASP.Net Excel & EPPlus Open Excel and Write Excel (Template)

        Dim template As New FileInfo(Server.MapPath("Xls/Template.xlsx"))
        Using package = New ExcelPackage(template)
            Dim workbook = package.Workbook

            '*** Sheet 1
            Dim worksheet = workbook.Worksheets.First()

            ' Rows1
            worksheet.Cells("A3").Value = "Data1-1"
            worksheet.Cells("B3").Value = "Data1-2"
            worksheet.Cells("C3").Value = "Data1-3"
            worksheet.Cells("D3").Value = "Data1-4"
            worksheet.Cells("E3").Value = "Data1-5"

            ' Rows2
            worksheet.Cells("A4").Value = "Data2-1"
            worksheet.Cells("B4").Value = "Data3-2"
            worksheet.Cells("C4").Value = "Data3-3"
            worksheet.Cells("D4").Value = "Data3-4"
            worksheet.Cells("E4").Value = "Data3-5"

            package.SaveAs(New FileInfo(Server.MapPath("Xls/myExcel.xlsx")))
        End Using

        Dim template As New FileInfo(Server.MapPath("Xls/Template.xlsx"))
        Using package = New ExcelPackage(template)
            Dim workbook = package.Workbook

            '*** Sheet 1
            Dim worksheet = workbook.Worksheets.First()

            For i As Integer = 3 To 10
                worksheet.Cells("A" + i).Value = "Data"
                worksheet.Cells("B" + i).Value = "Data"
                worksheet.Cells("C" + i).Value = "Data"
                worksheet.Cells("D" + i).Value = "Data"
                worksheet.Cells("E" + i).Value = "Data"
            Next

            package.SaveAs(New FileInfo(Server.MapPath("Xls/myExcel.xlsx")))
        End Using